Two Light Waves Have Wavelengths of 200 Nm and 400

Multiple Choice

Two light waves have wavelengths of 200 nm and 400 nm,respectively.How are their frequencies related?

A) The wave with a 200 nm wavelength has one-quarter the frequency of the 400 nm wave.
B) The wave with a 200 nm wavelength has one-half the frequency of the 400 nm wave.
C) The wave with a 200 nm wavelength has the same frequency of the 400 nm wave.
D) The wave with a 200 nm wavelength has twice the frequency of the 400 nm wave.