How does the light have to enter the glass:(a) to produce a large amount of bending?(b) for no refraction to happen?

(a) To produce a large amount of bending, the light rays have to enter the glass obliquely, making a large angle of incidence.

Explanation

The angle of refraction or the amount of bending of light depends on the refractive index  of the two media.

(b) For no refraction, the light rays have to enter the glass surface perpendicularly.

Explanation

If the light ray hits the glass block at right angles (at 90°) to the surface, then the light ray will not bend (no refraction).

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Updated on: 10-Oct-2022

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