What is the smallest possible angle of incidence?

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Solution

The angle of the ray approaching the surface that is far from $90^{\circ}$ is defined as the least feasible angle of incidence.
Therefore, the smallest possible angle of incidence could be 1 degree and less than 1 degree.

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1. how can angle of incidence is =angle of refraction

in case of reflection it is possible according to law .but reflection is not similar to refraction?

2.as it is said angle of incidence is =angle of emergence.then we can say that when angle of incidence increases then angle of emergence also increases?iam right.

Q. A ray incident at an angle

53^{\circ}

on a prism and emerges at an angle of

37^{\circ}

as shown in figure. If the angle of incidence is made

50^{\circ}

then possible value of the angle of emergence is

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What is the smallest possible angle of incidence?

The angle of the ray approaching the surface that is far from 90∘ is defined as the least feasible angle of incidence. Therefore, the smallest possible angle of incidence could be 1 degree and less than 1 degree.

The angle of the ray approaching the surface that is far from $90^{\circ}$ is defined as the least feasible angle of incidence.
Therefore, the smallest possible angle of incidence could be 1 degree and less than 1 degree.