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In what cases does a light ray not devia...

In what cases does a light ray not deviate at the interface of two media? `(AS_(7))`

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Assertion : Bending of light rays from its original path at the interface of the two media is called 'Refraction'. Reason : Whenever the light travels from denser medium to rarer medium, it bends away from the normal.

Asseration : Bending of the light rays from its original path at the interface of the two media is called 'Refraction. Reason : whenever the light travels from denser medium to rarer medium. It bends away from the normal .

When the light ray is incident normal to the interface between any two media, the angle of incidence is ___________ .

Why does a ray of light bend when it travels from one medium to another?

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Monochramatic light is incident on the pane interface AB between two media of refractive indices mu_1 and mu_2(mu_2gtmu_1) at an angle of incidence theta as shown in figure. The angle theta is infinitesimally greater thannte critical angle for the two media so thast total internal reflection takes place. Now, if a transparent slab DEFG of uniform thickness and of refractive inde mu_2 is introduced on theinterface (as shown in figure ) , show that for any value of mu_2 all light will ultimately be reflected back into medium II.

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