If mean wavelength of light radiated by `100 W` lamp is `5000 Å` , then number of photons radiated per second are

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

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

A ultra violet light bulb, emitting 400 nm and infrared bulb emitting 700 nm wavelength radiation each are rated at 130 W. Then the ratio of the number of photons emitted per second by the UV & IR sources :-

Photons of wavelength 660 nm are emitted from a 60 watt lamp. What is the number of photons emitted per second ?

Photons of wavelength 660 nm are emitted from a 60 watt lamp. What is the number of photons emitted per second ?

A 150 W lamp emits light of mean wavelength of 5500Å . If the efficiency is 12% , find out the number of photons emitted by the lamp in one second.

A 100 W sodium lamp radiates energy uniformly in all directions. The lamp is located at the centre of a large sphere that absorbs all the sodium light which is incident on it. The wavelength of the sodium light is 589 nm. What is the energy per photon associated with the sodium light ?