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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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The correct answer is:
red
red
As we know that when light ray goes from one medium to other medium, the frequency of light remains unchanged. And, $\quad \mathrm{c}=v \lambda$
So, $\mathrm{c} \propto \lambda$ the light of red colour is of highest wavelength and therefore of highest speed. Thus, after travelling through the slab, the red colour emerge first,
So, $\mathrm{c} \propto \lambda$ the light of red colour is of highest wavelength and therefore of highest speed. Thus, after travelling through the slab, the red colour emerge first,
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