Physics
What is magnifying glass? State its two uses.
Refraction Lens
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Answer
A magnifying glass is a convex lens of short focal length fitted in a steel (or plastic) frame provided with a handle.
Human eye has a limitation that in order to see an object by the naked eye, it is necessary to place it at least at a distance of 25 cm from the eye.
So, we use a magnifying glass, infront of our eyes so as to get an erect virtual and magnified image of the object.
Two uses of a magnifying glass are as follows —
- It is used by watchmakers, to see the small parts and screws of the watch.
- It is used to see and read the small alphabets or figures.
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