Question

If the wavelength of incident light on a (i) concave mirror and (ii) convex lens is increased, how will the focal length of each of these change?​

Answer 1

Answer:

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Explanation:

1) If the wavelength of incident light on a concave mirror is increased , there will be no change because reflection is independent of wavelength of incident light.

2) When wavelengthof incident light on a convex mirror is increased, refractive index of glass for the particular colour will decrease. Since the focal length of convex lens is related to refractive index ,the focal length increases.

Answer 2

Explanation:

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