Question

Assertion: A thick lens shows more chromatic aberration.

Reason : Thick lens behave as many thin lenses.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (c) A is true but R is false

Explanation:

Lenses have different refractive index for different wavelengths of light. The refractive index decreases with increasing wavelength. So red light will bend least and violet the most. This will result is slight dispersion which will be seen as chromatic aberration.