A source `S_1`, is producing `10^(15)` photons per second of wavelength 5000 Å. Another source `S_(2)` is producing `1.02xx10^(15)` photons per second of wavelength 5100 Å. Then, (powerr of `S_(2)`) is equal to (power of `S_(1)`)

Options

A. `1.04`
B. `0.98`
C. `1.00`
D. `1.02`

Answer

C

Explanation

If a source emits n photons per second of wavelength `lamda` then its power `P=n*(hc)/(lamda)`
`therefore (P_(2))/(P_(1))=(n_(1))/(n_(2))xx(lamda_(1))/(lamda_(2))=(1.02xx10^(15)xx(5000Å))/(10^(15)xx(5100Å))=1.00`