Question

Which of the following statement is TRUE? A. Nothing happens when light enter another medium. B. When light enters another medium, its wavelength changes but not its frequency C. When light enters another medium, its wavelength and frequency do not change D. None of the given

Answer 1

Answer:

D is the correct answer.

Answer 2

Answer:

When light travels from one medium to another medium its wavelength changes but not its frequency.

Explanation:

When light travels from one medium to another medium, a phenomenon known as refraction occurs. In this phenomenon when the medium of the path of light changes, the rays bend either towards or away from the surface.

• When light enters denser medium from rarer

If we incident a light ray on a prism or a glass slab, then we can observe that the radiation bends slightly towards the surface of the prism or slab. This is because the speed of the light decreases when traveling from rarer medium to rarer.

• When light enters rarer medium from denser

When light travels enters a rarer medium such as air from glass, it bends outwards, that is away from the glass. This is because the speed of the light increases when moving from denser to rarer.

As we know that the wavelength of the light changes, however, the frequency of the light does not change when traveling from one medium to another.

Hence the correct answer is given by option B, When light travels from one medium to another medium its wavelength changes but not its frequency.