A sound wave travels from air to water. The angle of incidence is `alpha_(1)` and the angle of refraction is `alpha_(2)`. Assuming Snells law to be valid:

A sound wave travels from air to water. The angle of incidence is alpha_1 , and the angle of reflection is alpha_2 . If the Snell.s law is valid, then ......

When a sound wave travels from water to air , it

When a sound wave travels from water to air , it

When sound waves travel from air to water which of these remains constant ?

The angle of incidence is always smaller than angle of refraction when a ray travels from air to glass. ______

A ray of light is travelling is travelling from air to water. What is the angle of incidence in air, if angle of refraction in water is 41^(@) ? Take refractive index of water = 1.32 .

A ray of light is travelling from glass to air. The angle of incidence in glass is 35^(@) , and angle of refraction in air 60^(@) . What is the refractive index of glass w.r.t. air ?