When a ray of light of frequency 6 times 10^{ | vedclass

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(B) The frequency of light depends only on the source and remains constant when light travels from one medium to another.The speed of light in a mediu

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speed becomes $5/6$th of its initial value

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(B) The frequency of light depends only on the source and remains constant when light travels from one medium to another.The speed of light in a medium is given by $v = c/n$,where $c$ is the speed of light in vacuum and $n$ is the refractive index.Speed in water: $v_w = c / (4/3) = 3c/4$.Speed in glass: $v_g = c / (8/5) = 5c/8$.To find the ratio of the new speed to the initial speed: $v_g / v_w = (5c/8) / (3c/4) = (5/8) 	imes (4/3) = 20/24 = 5/6$.Therefore,the speed becomes $5/6$th of its initial value.

When a ray of light of frequency $6 \times 10^{14} \ Hz$ travels from water of refractive index $4/3$ to glass of refractive index $8/5$,its

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