A beam of ligh incident on a surface has photons each of energy 1 mJ and intensity `25w//cm^(2)`. Find number of photons incident per second if surface area of `25cm^(2)`A. `6.25xx10^(5)s^(-1)`B. `8.25xx10^(5)s^(-1)`C. `6.25xx10^(4)s^(-1)`D. `5.25xx10^(5)s^(1-)`

A beam of ligh incident on a surface has photons each of energy 1 mJ a

1.	A beam of ligh incident on a surface has photons each of energy 1 mJ and intensity `25w//cm^(2)`. Find number of photons incident per second if surface area of `25cm^(2)`A. `6.25xx10^(5)s^(-1)`B. `8.25xx10^(5)s^(-1)`C. `6.25xx10^(4)s^(-1)`D. `5.25xx10^(5)s^(1-)`
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A beam of ligh incident on a surface has photons each of energy 1 mJ and intensity `25w//cm^(2)`. Find number of photons incident per second if surface area of `25cm^(2)`A. `6.25xx10^(5)s^(-1)`B. `8.25xx10^(5)s^(-1)`C. `6.25xx10^(4)s^(-1)`D. `5.25xx10^(5)s^(1-)`

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