Incident light travelling through water approaches the surface of the water and meets the boundary with air. The incident ray has an angle of incidence = 40°.
The refractive index of air is 1.00 and the refractive index of water is 1.33.
(d)
Calculate the angle of refraction for the refracted ray.
The diagram shows a student in a room with an open door and a television in the next room.
The student can hear the sound of the television, but cannot see the picture coming from it.
(b)
Complete the following sentences by circling the correct word to explain why this is the case.
Sound waves emitted from the television diffract / refract around the opening of the door because the amplitude / wavelength issimilar in size to the door. The amplitude / wavelength of light is much larger / smaller than that of the sound waves, so light is not not diffracted / refracted around the opening of the door.
