A ray of light is incident upon an air/water | vedclass

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(D) When light travels from one medium to another,its frequency $(f)$ remains constant because it depends on the source of light.The speed of light $(

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$I, III, IV$ only

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(D) When light travels from one medium to another,its frequency $(f)$ remains constant because it depends on the source of light.The speed of light $(v)$ changes because the refractive index of water is different from that of air $(v = c/n)$.Since $v = f \lambda$ and $f$ is constant,the wavelength $(\lambda)$ must change when the speed changes.According to Snell's Law,the direction of propagation changes when light enters a medium with a different refractive index at an angle other than $90^o$.Therefore,$(I)$,$(III)$,and $(IV)$ change,while $(II)$ remains constant.

$A$ ray of light is incident upon an air/water interface (it passes from air into water) at an angle of $45^o$. Which of the following quantities change as the light enters the water?
$(I)$ wavelength
$(II)$ frequency
$(III)$ speed of propagation
$(IV)$ direction of propagation

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$A$ ray of light is incident upon an air/water interface (it passes from air into water) at an angle of $45^o$. Which of the following quantities change as the light enters the water?$(I)$ wavelength$(II)$ frequency$(III)$ speed of propagation$(IV)$ direction of propagation