Question

Select the correct statement about the reflection and refraction of a wave at the interface between the medium $1$ and $2$ the

• A. Reflected wave has a phase change of $\pi$
• B. Wavelength of reflected wave is less than that of incident wave
• C. Frequency of transmitted wave is same as that of incident wave
• D. Frequency of wave changes as per nature of boundary

Answer 1

Answer: (C)

It is not said which of waves $1$ and $2$ is denser. But frequency of a wave remains same in all media.