Answer:
A
Explanation:
The energy E of a photon is
directly proportional to its frequency f by E = hf, where h is Planck's constant (above)
and the wavelength w is inversely proportional to the frequency by w = c/f, so we have
E related to w by: E = hc/w. Since h and c are constants, their product hc is constant
being 1.989 * 10**-25 joule-meters. So if we know E is 1.32 * 10**-18 J, we have:
1.32 * 10**-18 = (1.989 * 10**-25) / w or w = (1.989 * 10**-25) / (1.32 * 10**-18) Doing
the division and we find w = 1.507 x 10-7 meters, or 150.7 nanometers. (ultraviolet)
A. 150 x 10-7nm