Modern Physics> Photo Electric Effect...

A monochromatic beam of light (lamda=4900 A) incident normally up on a surface produces a pressure of 5x10^7N/m^2 on it.Assuming that 25% of the incident light is reflected and the rest absorbed.Find the number of photons falling per second on a unit area of thin surface???

M.vs vivek vardhan , 14 Years ago

Grade 12

1 Answers

Arun Kumar

Last Activity: 10 Years ago

Hello

P_absorb=E_(intensity)/c

P_reflect=2E_(intensity)/c

E_(intensity)=n*hc/lambda per unit area

we can get n from here

Thanks & Regards

Arun Kumar

Btech, IIT Delhi

Askiitians Faculty

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Modern Physics> Photo Electric Effect...

A monochromatic beam of light (lamda=4900 A) incident normally up on a surface produces a pressure of 5x10^7N/m^2 on it.Assuming that 25% of the incident light is reflected and the rest absorbed.Find the number of photons falling per second on a unit area of thin surface???

M.vs vivek vardhan , 14 Years ago

Arun Kumar

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