Question

What is the energy of a photon with a frequency of 1.7 × 1017 Hz? Planck’s constant is 6.63 × 10–34 J•s.

1.1 × 10–17 J 


1.1 × 10–16 J
8.3 × 10–16 J
8.3 × 10–15 J

Answer 1

The correct answer is B.

Step-by-step explanation:

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Answer 2

The energy carried by a single photon is given by

`E=hf`
where h is the Planck's constant and f is the frequency of the photon.

The photon of our exercise has a frequency of
`f=1.7 \cdot 10^(17) Hz`, therefore its energy is

`E=hf=(6.63 \cdot 10^(-34)Js)(1.7 \cdot 10^(17) Hz)=1.1 \cdot 10^(-16) J`