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

Question

Quizplus · Accepted Answer

The number of photons emitted per second is directly proportional to the power of the source. Since all three sources emit at the same power of 50 mW, the source with the highest frequency (blue) will have the least number of photons per second because it has a higher energy per photon. Therefore, the blue source emits the least photons per second.

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