1.

Red light is incident on a converging lens of focal length f . State with reason how f will change if red light is replaced by blue light

Answer»

ength of a lens varies linearly with WAVELENGTH of LIGHT used. This is what leads to chromatic dispersion!SINCE violet light has a shorter wavelength compared to RED light, focal length of a lens will decrease if red light is REPLACED by violet light.Hope that helps!!



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