Q 11-14-078JEE MainJEE Main 2022 (27 Jun, Shift 2)Easy
If a wave gets refracted into a denser medium, then which of the following is true?
Answer: (C) Wavelength and speed decreases but frequency remains constant.
Frequency is set by the source and does not change on refraction.
In a denser medium the speed decreases, and since $\lambda = v/f$, the wavelength decreases too.
Solution by Sreeraj P, M.Sc Physics