When the wavelength decreases, the frequency: A. INCREASES
B. DECREASES
C. REMAINS THE SAME
D. STOPS

The frequency increases

Explanation:

The number of complete wavelengths in a given unit of time is called frequency (f). As a wavelength increases in size, its frequency and energy (E) decrease. From these equations you may realize that as the frequency increases, the wavelength gets shorter. As the frequency decreases, the wavelength gets longer.

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