Sources of red,blue,and yellow light each emit light with a power of 50 mW.Which source emits more photons per second?
A)the red source
B)the blue source
C)the yellow source
D)They all emit the same number per second.

Question

Quizplus · Accepted Answer

The energy of a photon is inversely proportional to its wavelength. Red light has the longest wavelength among the three, meaning it has the lowest energy per photon. Therefore, for the same power, the red source emits more photons per second.

Sources of Red,blue,and Yellow Light Each Emit Light with a Power