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A glass prism is immersed in a hypotheti...

A glass prism is immersed in a hypothetical liquid. The curves showing the refractive index n as a function of wavelength `lambda` for glass and liquid are as shown in Figs. When a ray of white light is incident on the prism parallel to the base

A

yellow ray travels without deviation

B

blue ray is deviated toward the vertex

C

red ray is deviated towards the base

D

there is no dispersion

Text Solution

Verified by Experts

The correct Answer is:
a., b., c.
n forliquid `=n` for glass `//` yellow light
but n for liquid `lt` n for glass (red light), so it will deviated toward base, for blue light n (liquid) `gt` n (glass) so it will deviate towards vertex
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