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Drawbacks of Refracting Telescope

Which of the ...

Question

Which of the following has a smaller chromatic aberration?

A

crown-glass lens

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B

flint-glass lens

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C

both have equal chromatic aberration

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D

insufficient information

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Solution

The correct option is A crown-glass lens
Crown glass lens are used to reduce chromatic aberrations which is due to dispersion of glasses partially compensating each other.

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Similar questions

Q. Which of the following will produce smaller chromatic aberration?

Q. Which of the following has a larger chromatic aberration?

Q. The focal length of a convex lens made of flint glass is

15 c m

. To remove its chromatic aberration, it is placed in contact with a concave lens made of crown glass. Find the focal length of the concave lens. The ratio of dispersive powers of flint glass to crown glass is

1.5

.

Q. Which of the following will produce greater chromatic aberration?

Q. Assertion (A) : An achromatic combination of lens is needed for the minimisation of chromatic aberration.
Reason (R) : A single lens alone cannot satisfy the condition of minimisation of chromatic aberration

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