Question

As the wavelength increases, the frequency
(A) decreases and energy decreases.
(B) increases and energy increases.
(C) decreases and energy increases.
(D) increases and energy decreases.

Answer 1

As the wavelength increases, frequency decreases. A wavelength is the distance from, say, a crest to a crest, or perhaps a trough to a trough. Frequency is essentially how many waves or how many cycles of a wave there are per unit of time, and we usually apply the term cycles per second or Hertz (which means cycles per second) to it.
Wavelength is the physical distance the wave will travel as a single cycle of that wave occurs. And wavelength is a function of both frequency and of the speed of propagation of that wave. In any case, a longer wavelength is associated with a lower frequency. Increasing (lengthening) the wavelength decreases the frequency.

Answer 2

hope this helps