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Question

Question: What will be the energy of one photon of radiation whose frequency is \(5 \times 10^{14}\)Hz?...

What will be the energy of one photon of radiation whose frequency is 5×10145 \times 10^{14}Hz?

A

199.51kJmol1199.51kJmol^{- 1}

B

3.3×109J3.3 \times 10^{- 9}J

C

6.626×1034Js6.626 \times 10^{- 34}Js

D

2.31×105J2.31 \times 10^{5}J

Answer

3.3×109J3.3 \times 10^{- 9}J

Explanation

Solution

: Energy of one photon is given by the expression

E=hυh\upsilon

E = 6.626×1034Js×5×1014s1=3.313×1019J6.626 \times 10^{- 34}Js \times 5 \times 10^{14}s^{- 1} = 3.313 \times 10^{- 19}J