If the Total Energy of Radiation of Frequency 10^14 Hz is 6.63 J, Calculate the Number Of Photons In the Radiation. - Physics

Sum

If the total energy of radiation of frequency 1014 Hz is 6.63 J, calculate the number of  photons in the radiation. (Planck’s constant = 6.63 x 10–34 J.s.)

Solution

Given: E = 6.63 J, v = 1014 Hz, h = 6.63 x 10–34 Js.

n = E/(hv)

  =6.63/(6.63xx10^(-34) xx 10^(14))

  =6.63/(6.63xx10^(-20))

n = 1/10^(-20)

n = 10^20

The number of photons emitted in the radiation are 1020.

Concept: Photoelectric Effect - Hertz’S Observations
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