Question

Which part of the electromagnetic spectrum has the highest level of photon energy

A.Radio waves
B.x-rays
C.visible light
D.gamma rays

Answer 1

Photon energy is directly proportional to frequency.  So if we
want to find the radiation with the greatest photon energy, we
should look for the waves with the highest frequency (shortest
wavelength).  From the list of choices, that's 'gamma rays'.