What does a simple magnifying glass consist of?

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Solution

Simple magnifying glass:
An object is said to be magnified if the image produced is larger than the object itself.
A magnifying glass's image will serve as the object for the eye.
As a result, the magnifying glass's image must be quite large.
Convex lenses produce enlarged images.
Thus a simple magnifying glass consists of a convex lens.

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Answer the following questions:

(a) The angle subtended at the eye by an object is equal to the angle subtended at the eye by the virtual image produced by a magnifying glass. In what sense then does a magnifying glass provide angular magnification?

(b) In viewing through a magnifying glass, one usually positions one’s eyes very close to the lens. Does angular magnification change if the eye is moved back?

(c) Magnifying power of a simple microscope is inversely proportional to the focal length of the lens. What then stops us from using a convex lens of smaller and smaller focal length and achieving greater and greater magnifying power?

(d) Why must both the objective and the eyepiece of a compound microscope have short focal lengths?

(e) When viewing through a compound microscope, our eyes should be positioned not on the eyepiece but a short distance away from it for best viewing. Why? How much should be that short distance between the eye and eyepiece?

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Q. A magnifying glass or a simple microscope consists of a _____lens fitted in a round metallic frame with a handle.

At what position does a magnifying glass is kept to manify the object?

Q. Does magnifying glass work on a similar principle?

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