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| 1. |
Using lens maker's formula, show how the focal length of a given lens depends upon the colour of light incident on it. |
| Answer» Solution :As per LENS maker.s formula `1/f = (n-1) (1/R_(1) - 1/R_(2))`. As refractive index V of a lens depends upon the colour of incident LIGHT, it is OBVIOUS that the focal length ./. of the lens will DEPEND on the colour of incident light. | |