Question

A photon of light from which of the following electromagnetic radiations carries the greater amount of energy?

• A. Blue
• B. Green
• C. Orange
• D. Red
• E. Yellow

Answer 1

Answer: (A)

Blue

We know that energy of a photon is given by ,

$E=h\nu$

where $\nu$ is the frequency of radiation ,

now in electromagnetic visible spectrum we have decreasing order of frequency as , $VIBGYOR$ , since energy is directly proportional to frequency as shown by above relation, we can see by $VIBGYOR$ that blue radiation has greater frequency in the given radiations , therefore it has greater amount of energy.