Q. What happens to the frequency of a wave if its wavelength decreases and speed remains constant?
✅ Correct Answer: (A)
It increases
Explanation: Since wave speed = frequency × wavelength, a decrease in wavelength means frequency must increase if speed is constant.
Explanation by: Sikhar Chaudhary
Since wave speed = frequency × wavelength, a decrease in wavelength means frequency must increase if speed is constant.