Magnifying glasses are often used for viewing three-dimensional objects.
This angle, therefore, divided by the magnifying power of the telescope gives the real angular distance of the centres of a double star.
focal length, having eye-pieces magnifying up to 230 diameters.
focal length, with a magnifying power of 38 diameters, which he presented to the Royal Society of London in December 1671.
In magnifying glasses for direct vision the eye must always be considered.
The magnifying power is = Fle.
The magnifying power is computed by the same formula as in the case of the Gregorian telescope.
The magnifying power of the telescope is = Ff /ex, where F and f are respectively the focal lengths of the large and the small mirror, e the focal length of the eye-piece, and x the distance between the principal foci of the two mirrors (=Ff in the diagram) when the instrument is in adjustment for viewing distant objects.
Another form of the word, "Egotism," is really interchangeable, though in ordinary language it is often used specially (and similarly "egoism," as in George Meredith's Egoist) to describe the habit of magnifying one's self and one's achievements, or regarding all things from a selfish point of view.
of the magnifying power of telescopes, for the rays emerging from the eye-piece when adjusted for distinct vision to be parallel.
It has mainly to be considered in connexion with powerful magnifying glasses.
His aim was really to make the ecclesiastical courts independent of the law by speciously magnifying the royal authority over them.
Hence one of the best methods of determining the magnifying power of a telescope to measure the diameter of the emergent pencil of rays, after the FIG.
He then altered the magnifying power by sliding the field lens of the eye-piece (which was fitted with a slipping tube for the purpose) along the eye-tube, till the images were brought into contact.
With low magnifying systems and a large free object distance, ordinary good daylight is sufficient.
In this way the scale can be viewed by a microscope of much higher magnifying power than can be employed for the photographed spectrum.
The sharpness of image in Kepler's telescope is very inferior to that of the Galilean instrument, so that when a high magnifying power is required it becomes essential to increase the focal length.
Also the diameter of the pencil or parallel rays emerging from the eye-lens to the diameter of the object-lens inversely as, the magnifying power of the telescope.
The system consequently acts as a continuous lens, magnifying the object in a vertical direction.
When the details are no longer recognizable by the unaided eye, the magnifying glass or the simple microscope is necessary.
A, slip as received on recorder, using ordinary relays for translating on to second cable; B, slip as received on recorder, when interpolator is used at intermediate station, for sending on to second cable; C (four cells through a line, KR=3.6), signals with recorder under ordinary conditions; D, all conditions the same as in C, but magnifying relay inserted between the end of the line and the recorder.
The magnifying power is varied by changing the lens a for another in which p has a different value.
Hence a wide beam demands treatment with further apparatus (usually a telescope) of high magnifying power.
In observing the bands he received them at first upon a screen of finely ground glass, upon which a magnifying lens was focused; but it soon appeared that the ground glass could be dispensed with, the diffraction pattern being viewed in the same way as the image formed by the object-glass of a telescope is viewed through the eye-piece.
If we hold a common reading lens (a magnifying lens) in front of a lamp or some other bright object and at some distance from it, and if we hold a sheet of paper vertically at a suitable distance behind the lens, we see depicted on the paper an image of the lamp. This image is inverted and perverted.
He was well acquainted with the use of magnifying glasses and suggested a kind of telescope for viewing the moon, but does not seem to have thought of applying a lens to the camera.
In experiments with magnifying glasses, and through spars, the ordinary effects of magnifying and of alteration of view are sometimes produced; sometimes they are not.
The word is also used as a unit of linear measurement of the magnifying power of a lens or microscope.
This he mentions " because the glasses in these two sorts are somewhat prismatical, a but mostly those of the first model, which could therefore bear no great charge (magnifying power)."
(d) The scales are made of iridio-platinum instead of silver, and the magnifying power of the reading microscope is increased fourfold (viz.
13" or 14" when the magnifying power is loo, and varying inversely as the power.
Allowance should be made for the habit of exaggeration among the Spanish adventurers of that time, and also for the diplomacy of Cortes in magnifying his exploits to win the' favour of his king.
The magnifying power obviously depends on the proportion of the focal length of the object-lens to that of the eye-lens, that is, magnifying power where F is the focal length of the object-lens and e that of the eye-lens.
The sand, which is nominally the filter, has interstices about thirty times as wide as the largest dimensions of the larger microbes; and the reason why these, and, still more, why organisms which were individually invisible under any magnifying power, and could only be detected as colonies, were arrested, was not understood.
away; and observation through the magnifying glass must be undertaken by the normal eye with passive accommodation.
If the ordinary convex lens be employed as magnifying glass, great aberrations occur even in medium magnifications.
This lens is employed in articles found in tourist resorts as a magnifying glass for miniature photographs of the locality.
By introducing a dispersive lens of flint the magnifying glass could be corrected for both chromatic and spherical aberrations.
By a scale attached to the sliding tube the magnifying power of the eye-piece was deduced, and this combined with the angle of the prism employed gave the angle measured.
Formerly, writers accounted for the Lutheran movement by so magnifying the horrors of the pre-existing regime ity of the that it appeared intolerable, and its abolition consequently inevitable.
Less conspicuous periscopes were therefore designed, and these, in order to take in enough of the foreground, had to be provided with a magnifying as well as a reflecting system.
The magnifying power of the eye-piece is that of a single lens of focus = Jp.
If p" is the refracting angle of the prism, and n the magnifying power of the eye-piece, then p"ln will be the distance observed.
But his pretensions were ludicrous; he was quickly captured by the Chileans and sent back to France (1862) as a madman; and though he made one more abortive effort in 1874 to recover his "kingdom," and occupied his pen in magnifying his achievements, nobody took him seriously except a few of the deluded Indians.
A rumour of the new invention, which reached Venice in June 1609, sufficed to set Galileo on the track; and after one night's profound meditation on the principles of refraction, he succeeded in producing a telescope of threefold magnifying power.
There is reason to believe that the magnifying power of transparent media with convex surfaces was very early known.
A normal eye will therefore see an image formed by the magnifying glass most conveniently when it is produced at a great distance, i.e.
l/y = i/f = V.1; (2) it is thus equal to the magnifying power multiplied by the distance of distinct vision, or the number of times that the focal length is contained in Io in.
A volume entitled Opera posthuma (Leiden, 1703) contained his "Dioptrica," in which the ratio between the respective focal lengths of object-glass and eye-glass is given as the measure of magnifying power, together with the shorter essays De vitris figurandis, De corona et parheliis, &c. An early tract De ratiociniis tin ludo aleae, printed in 16J7 with Schooten's Exercitationes mathematicae, is notable as one of the first formal treatises on the theory of probabilities; nor should his investigations of the properties of the cissoid, logarithmic and catenary curves be left unnoticed.
Setting fire to a tree stump one lunchtime by testing a magnifying glass.
To search click on the magnifying glass icon in the selector box.
I) tan w = y/l, where l = i o in., whilst the apparent size of the object viewed through the magnifying glass would result from the formula (I) tan w' = y/f.
Supposing, however, there is oblique illumination, then formula (5) can always be applied to determine the magnifying power attainable with at least one objective.
By substituting y, the size of the object, for d, the smallest value which a single object can have in order to be analysed, and the angle w' by 2', we obtain the magnifying power and the magnification number: V2 = tan w'Id= 2A tan 2'/X; N2 = 2Al tan 2'/A; where 1 equals the sight range of io in.
The magnification and magnifying number which are most necessary for a microscope with an objective of a given aperture can then be calculated from the formulae: V4 = 2A tan 4'/X; N4 = 2Al tan 4'/A.
Virtual images are often used, for example, in magnifying lenses, where the image must be viable from different angles.
The images were taken using a small magnifying lens in front of the camera lens held in place with putty.
If a slit-lamp is not available, examination is possible using a magnifying loupe and appropriate light source.
Signs In order to elicit the signs, patients should be examined using a slit lamp or magnifying loupes.
magnifying glass by taking your finger off the left mouse button.
magnifying lens to enable your standard lens to focus much closer.
magnifying glass icon in the selector box.
The horn would be blown into the hollow thus magnifying its sound.
Built-in magnifying lens and luminous markings for night navigation are other important features for the most demanding users.
red spider mite is just about visible, with the help of a magnifying glass.
Transformed with the goodly transformation of the transfiguration of Christ, we find ourselves made radiant by our good works, magnifying it.
Some of these are rendered unreadable without the use of a magnifying glass- surely a disincentive.
The first binocular magnifying glass or simple microscope (German, Lupe) was devised by J.
The angle of rotation is measured on the graduated circle C. The angle between the objects measured is = r sin 20, where r is a constant to be determined for each magnifying power employed,' and 0 the angle through which the sphere has been turned from zero (i.e.
in diameter when viewing faint objects, we obtain the rule that the minimum magnifying power which can be efficiently employed is five times the diameter of the object-glass expressed in inches.`'- The defects of the Galilean and Kepler telescopes are due to the chromatic and spherical aberration of the simple lenses of which they are composed.
distant that the two perspectives formed by the naked eye are no more distinguished from each other, recourse may be had to binocular telescopes and range-finders; and if the objects be so small that, in order to observe details on them, we must bring our eyes so close to the objects that they cannot accommodate the images, recourse may be had to binocular microscopes and magnifying glasses.
Party invitations could be designed in the shapes of magnifying glasses, butterfly nets, or explorer hats.
Choose something you're comfortable with and that has an easy layout that you can see clearly without a magnifying glass.
Inquisitive (but naughty) children have found that catching the sun's rays in a magnifying glass at the correct angle will burn any ants on the other side of the glass.
Interesting accents like magnifying glasses, musical instruments, ornate boxes, or aged photographs can add charming appeal to the space.
Shaving mirrors, magnifying mirrors and pull out mirrors can also be options in some of today's medicine cabinets to make the cabinet an integral part of the room.
Makeup, or cosmetic mirrors usually contain both a standard mirror, and a magnifying mirror on the reverse side.
Magnifying cosmetic travel mirrors are also popular essentials for women on the go.
Magnifying makeup mirrors are available in discount and department stores, such as Target and Wal-Mart, drug stores, beauty supply stores, specialty stores, and a plethora of online venues.
Taking a good, close look at your face has never been easier than with the help of a magnifying makeup mirror.
Magnifying makeup mirrors serve a purpose for almost anyone who applies makeup, examines her face for imperfections or simply can't see clearly with a basic mirror.
A magnifying mirror instantly makes your image clearer and more visible.
It may seem as though there is only one obvious reason to use a magnifying makeup mirror, but there are plenty of uses for this useful tool.
Many magnifying mirrors are lighted, which allows the user to simulate a salon experience within the comfort of his or her own home.
It is important to keep in mind that not all magnifying makeup mirrors are considered optically correct.
Essentially, they are more effective than a regular magnifying mirror, which typically just increases size.
The world of magnifying makeup mirrors seems to grow yearly.
Many brands specialize solely in magnifying mirrors, while other more common everyday brands specialize in a variety of mirrors.
For those who assume there are only a few different types of magnifying mirrors, Zadro challenges you to think again.
The brand's collection of magnifying mirrors is wide and varied.
Vanity mirrors, compact mirrors and magnifying makeup mirrors are just a few of the products offered from the aptly-named Magic Focus.
Magnifying makeup mirrors are readily available at beauty supply stores like Sally Beauty Supply and Ulta.
This tool is ideal for anyone who appreciates the benefits of a regular magnifying makeup mirror.
It sounds a mite more complex, but the concept behind this innovative travel makeup mirror is the same as that of any other magnifying mirror.
Nearly everyone can benefit from a magnifying mirror.
Double sided mirrors, also referred to as magnifying makeup mirrors, include a regular mirror view on one side and a magnified view on the other side.
A magnifying glass accompanied both Compact editions.
Available options include faux chrome, glowing edges, posterization, neon glow, colored foil, faux enamel, halftone, colored edges, hot wax coating, magnifying lens, and solarize.
There are many different types of magnifying glasses and sound augmentation devices available to make it easier for the elderly to enjoy their favorite pastimes.
You may have seen the Eyeglass Repair Kit with Magnifying Glass on TV.
Included in this kit are two screwdrivers with extension handles, four screws in varying sizes, two nose pads, two rubber o-rings, a glasses strap and a magnifying glass.
Use a magnifying glass if you have one to easily determine the cause of the break.
There, you'll find the Carson OD-14 Clip & Flip Magnifying Lenses.
Monks or craftsmen of Pisa or Venice, Italy used magnifying glass set in bone, leather, and metal in an inverted V shape to create the first eyeglasses that could be balanced on the nose.
The bottom portion of each lens, however, has a magnifying section, much like a bifocal, so that when you look down as if to read something, you're looking through that part.
Unless you have an eagle eye though, a magnifying glass would be a nice addition.
If the warts are small, the doctor may put a vinegar-like liquid on the skin, which makes the warts turn white and easier to see, and then use a magnifying glass to look for them.
Good light and possibly a magnifying glass are required.
Some people prefer to use lighted magnifying mirrors, particularly for facial hair, though any clean mirror will suffice.
Several brands of tweezers are available with non-slip grips on the arms as well as attached magnifying glasses for delicate work.
Let them use a magnifying glass to examine objects more closely.
Using a special magnifying lens, he locates the ends, cuts away the closed-off segments, and reconnects the two parts using very fine stitches.
Sometimes these bottles are very tiny and difficult to read, so make sure you have your reading glasses or a magnifying glass handy when shopping.
Patrons should not be shy about asking to see the stones outside the case in order to examine every angle, and reputable dealers will have loupes, magnifying glasses, and other tools such as microscopes available for such inspections.
However, there are also quality imitations that are nearly indistinguishable from real dark pearls to the naked eye unless viewed under a magnifying glass.
With the help of tools such as a GPS system, binoculars, and magnifying glasses, Diego uncovers unique and interesting facts about various animals.
A magnifying glass and a white paper plate are two simple tools that can be used for viewing bugs up close.
Lay them gently on the white paper plate and watch them crawl under a magnifying glass before letting them go.
The watches are painstakingly assembled with tweezers and magnifying glasses -- are a true labor of love.
In short, an iBeam watch is a digital timepiece with a built-in, pop-up magnifying glass and flashlight.
Two years later, he was ready to introduce his own watch, magnifying lens, and flashlight combination which he branded as the 20.20 collection.
Conveying the right message doesn't mean you should cram so much information in your message to make your business card unreadable without using a magnifying glass.
Magnifiers. You can buy a set of magnifying lenses that are almost like goggles, which will make it easier for you to read you pattern and to see the squares in your needlepoint fabric.
Use a magnifying glass to spot pieces of gravel or other trash in the wound.
The most obvious place to search for anything on Facebook is right there at the top of the page, in a simple blank text input box labeled both with the word and also the typical magnifying glass icon.
convergest familiar lens is the magnifying glass which is an example of a convex or converging lens.
In the middle of the day the miniature eyebrights open up and are ideally viewed through a magnifying glass.
The mouse pointer should change from a magnifying glass to a normal pointer and should let you do some quick editing before printing.
The word usage examples above have been gathered from various sources to reflect current and historial usage. They do not represent the opinions of YourDictionary.com.