Question

as the wavelength of a wave increases on the electromagnetic spectrum, what happens to the energy of the wave?
a. it stays the same.
b. it decreases.
c. the waves energy does not depend on its wavelength.
d. it increases.

Explanation:

The energy of an electromagnetic - wave is inversely proportional to its wavelength. The formula for the energy of a photon is $E = \frac{hc}{\lambda}$, where $E$ is energy, $h$ is Planck's constant, $c$ is the speed of light, and $\lambda$ is the wavelength. As $\lambda$ increases, with $h$ and $c$ being constants, the value of $E$ decreases.

Answer:

B. It decreases.