A source `S_(1)` is producing `10^(15)` photons/s of wavelength `5000 Å` Another source `S_(2)` is producing `1.02 xx 10^(15)` photons per second of wavelength `5100 Å`. Then `("power of" `S_(2))/("power of" S_(1))` is equal to

Options

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

Answer

A

Explanation

`(P_(S_2))/(P_(S_1))=(n_2lamda_1)/(n_1lamda_2){P=n(hc)/lamda}`
`=(1.02xx10^(15)xx5,000)/(10^(15)xx5,000)`
= 1.04