Question

A ray of light travelling in water is incident on its surface open to air. the angle of incidence is θ, which is less than the critical angle. then there will be :-

Answer 1

it will refract due to lower value of incident angle...

Answer 2

Answer:

Explanation:

Angle of incidence = θ (Given)

Critical angle = Less than angle of incidence (Given)

When any ray of light will travel from optically denser to a rarer medium, it shifts away from the normal. The angle of reflection becomes equal to the angle of incidence. When light incidence from one medium to another, some light refracts, some reflects and some may get absorbed when the angle of incidence will be less than the critical angle.

Thus, the angle formed between the reflected and refracted ray is 90-θ+90-θ = 180 - (θ+θ'). As θ'>θ then the angle between them will be 180-θ. Thus the angle between them would be less than 180°–2θ