A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is

A short pulse of white light is incident from air to a glass slab at n

1.	A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is
Answer» blue green violet red SOLUTION :In the equation `v = LAMBDA f` we have f = CONSTANT `therefore v prop lambda` Since red light has maximum wavelength in the white light, its velocity WOULD be maximum and so it will COME out of glass slab first of all the remaining colours.

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A short pulse of white light is incident from air to a glass slab at normal incidence. After travelling through the slab, the first colour to emerge is

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