Question

Which statement correctly describes the relationship between frequency and wavelength?

As the frequency of a wave increases, the longer its wavelength is.
As the frequency of a wave increases, the shorter its wavelength is.
As the frequency of a wave increases, its wavelength remains the same.

Answer 1

As frequency increases, wavelength decreases — so the correct statement is:

"As the frequency of a wave increases, the shorter its wavelength is."

Reason: wave speed v = frequency f × wavelength λ, so λ = v/f; for a fixed wave speed, higher f means smaller λ.