1(xiv)
When a ray of light enters from a denser medium to a rarer medium then:
- (a)the light ray bends towards the normal
- (b)the speed of light increases
- (c)the angle of incidence is greater than the angle of refraction
- (d)its wavelength decreases.
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the speed of light increases
Reason — The speed of light increases when it enters from a denser medium to a rarer medium. Lower density of the rarer medium causes less interaction between photons and particles. This reduces the scattering and results in a higher speed.