Photon Counts Emitted By A Source Per Second

A 100 W point source emits monochromatic light of wavelength 6000 A Calculate the total number of photons emitted by the source per second.

A monochromatic source emits light of wavelength 550 nm is emitted by a source . Find the number of photons emitted by the source in 90 seconds if power of source is 60 W.

A bulb emits light of 4500 Å . The bulb is rated as 150 watt and 9 % of the energy is emited as light . How many photons are emitted by the bulb per second ?

The number of photons emitted by a 60 W bulb per second, if 10% of the electrical energy supplied to an incandescent light bulb is radiated as visible light, is

Calculate the number of photons emitted by a 60 W bulb per second, if 10% of the electrical energy supplied to an incandescent light bulb is radiated as visible light.

A bulb emits light of wavelength 4500Å .The bilb is nrated as 150 and 8% of the energy is emmitted as light .How amny photon are emitted by the bulb per second?

A 20 W lamp rated 10% emits light of wavelength y. Calculate the number of photons emitted by the lamp per second.