Two sources emit beams of light of wavelength $550 \mathrm {~nm}$. The light from source A has an intensity of $10 \mu \mathrm { W } / \mathrm { m } ^ { 2 }$, and the light from source $B$ has an intensity of $20 \mu \mathrm { W } / \mathrm { m } ^ { 2 }$. This is all we know about the two beams. Which of the following statements about these beams are correct? (There could be more than one correct choice.)
A) A photon in beam B has the same energy as a photon in beam A.
B) $A$ photon in beam $B$ has twice the energy of a photon in beam $A$.
C) The frequency of the light in beam $B$ is twice as great as the frequency of the light in beam $A$.
D) Beam B carries twice as many photons per second as beam A.
E) None of the above statements are true.

Question

Quizplus · Accepted Answer

The Answer of Two sources emit beams of light of wavelength $550 \mathrm {~nm}$. The light from source A has an intensity of $10 \mu \mathrm { W } / \mathrm { m } ^ { 2 }$, and the light from source $B$ has an intensity of $20 \mu \mathrm { W } / \mathrm { m } ^ { 2 }$. This is all we know about the two beams. Which of the following statements about these beams are correct? (There could be more than one correct choice.)
A) A photon in beam B has the same energy as a photon in beam A.
B) $A$ photon in beam $B$ has twice the energy of a photon in beam $A$.
C) The frequency of the light in beam $B$ is twice as great as the frequency of the light in beam $A$.
D) Beam B carries twice as many photons per second as beam A.
E) None of the above statements are true.

Two Sources Emit Beams of Light of Wavelength 550 nm550 \mathrm {~nm}550 nm

Two Sources Emit Beams of Light of Wavelength $550 \mathrm {~nm}$