An obliquely incident light ray bends at surface due to change in speed, when passing from one medium to another. The ray does not bend when it is incident normally. Will the ray have different speed in different medium.Expalin.

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An obliquely incident light ray bends at the surface due to change in speed, when passing from one medium to other. The ray does not bend when it is incident normally. Will the ray have different speed in other medium?

Q. Fill in the blanks :

A light ray travelling obliquely from a denser medium to a rarer medium bends ................... the normal. A light ray bends ................... the normal when it travels obliquely from a rarer to a denser medium.

Q. (i) Write relationship between the angle of incidence and the angle of refraction for a given pair of media.
(ii) When a ray of light enters from one medium to another having different optical densities it bends. Why does this phenomenon occur?
(iii) Write one condition where it does not bend when entering a medium of different optical density.

Q. A light ray does not bend at the boundary in passing from one medium to the other medium if the angle of incidence is:

When light is incident obliquely from one medium to another medium, the direction of light rays in the second medium___.

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