According to Einstein's Theory, the Energy of a Photon Is

Multiple Choice

According to Einstein's theory, the energy of a photon is:

A) proportional to its wavelength.
B) proportional to its frequency.
C) constant, since the speed of light is a constant.
D) quantised, since it always appears in bundles of size, 1.6 *10-19 C.
E) proportional to the square of the frequency.