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There are two types of lenses: Converging lenses and Diverging lenses, depending on whether they…
There are two types of lenses: Converging lenses and Diverging lenses, depending on whether they converge or diverge an incident beam of light. They are also called convex or concave lenses. Lenses are usually made of glass. Convex lenses are more popular as they form a real image of an object. They are widely used in our daily life, for instance, in microscopes, telescopes, projectors, cameras, spectacles etc. Microscopes are used to view small and nearby objects whereas telescopes are used to see distant objects.
Read the passage given below and answer the questions that follow.
(i)[1.0]
State any one factor on which focal length of a lens depends.
(ii)[1.0]
Give an example where a convex lens behaves like a diverging lens.
(iii)[1.0]
What type of lens is used in a camera?
(iv)[1.0]
Write an expression for magnifying power of a compound microscope when its final image lies at the least distance of distinct vision ($D$).
(v)[1.0]
State any one difference between a reflecting telescope and a refracting telescope.
Answer
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From ISC 2023 Physics Paper 1, question 20.