An AIR station is broadcasting the waves of wavelength `300 metres`. If the radiating power of the transmitter is `10 kW`, then the number of photons radiated per second is

Options

A. `1.5 xx 10^(29)`
B. `1.5 xx 10^(31)`
C. `1.5 xx 10^(33)`
D. `1.5 xx 10^(35)`

Answer

B

Explanation

`P = ( W)/(t) = ( nhc)/( lambda t) rArr ((n)/(t)) = ( P lambda)/( hc) = (10 xx 10^(3) xx 300)/( 6.6 xx 10^(-34) xx 3 xx 10^(8))`
`= 1.5 xx 10^(31)`