Question

Q7 A ray of light is travelling in a direction perpendicular to the boundary of a parallel glass slab. The ray of
1
light:
(a) Is retracted towards the normal
(b) Is refracted away from the normal
(c) Is reflected along the same path
(d) Does not get refracted​

Answer 1

Answer:

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Explanation:

12th

Physics

Ray Optics and Optical Instruments

Refraction of Light and Laws of Refraction

When a ray of light travels...

PHYSICS

Refraction happens when light enters a medium where its speed is different or when it passes from a fast medium to a slow medium. If a ray of light is incident normally to the surfaces, then deviating from the normal will always increase the time of travel according to the Snell’s law.

According to which,

Sine (angle of incidence)*index of refraction of the incident medium=sine (angle of refraction)* index of refraction of the refractive medium

Since angle of incidence is 0 degrees, sine (0)=0.

So, the light ray will pass without any deviation.