A man on an airplane is walking toward the back of the airplane at 7 m/s. The plane is flying west at 245 m/s. What is the speed and direction of the man relative to the ground?.

The energy of a photon can be calculated by the formula:

E=hu,

where h is Planck’s constant and u is the frequency of the wave. The equation that relates the frequency to the wavelength is:

c=wu,

where c is the speed of light in a vacuum (constant), w is the wavelength of the wave, and u, again, is the frequency.

If you have a short wavelength, the frequency must me large to keep the equation constant, and a large frequency causes a greater magnitude of energy. Your answer should be A.

Hope this helps!