The wavelength of light beam b is twice the wavelength of light beam b. the energy of a photon in beam a is:

a. one-fourth the energy of a photon in beam b
b. half the energy of photon in beam b
c. equal to the energy of a photon in beam b
d. twice energy of a photon in beam b four times the energy of a photon in beam b

Corrected question: The wavelength of light beam A is twice the wavelength of light beam B. The energy of a photon in beam A is:

B

Explanation:

Energy = hc/λ

λ(A) =2λ(B)...................equation 1

We will solve for the ratio of energy of A to energy of B.which is

=(hc/λA) ÷ (hc/λB)

referring to equation 1 we have

=(hc/2λB) ÷ (hc/λB)

=hc/2λB) × (λB/hc)

= λB/2λB

=1/2

The energy of A is half of B

answer: electrons

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