A `100 W` power source emits green light at a wavelegth of `5000Å ` .How many photon p-er minute are emitted by the source

A 100 W power source emits green light at a wavelength lambda=5000A^@ . How many photons per minute are emitted by the source ?

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

A 5 W point source emits monochromatic light of wave length 5000Å How many photons per second strike a unit area placed 5m away from the source and illuminated by it?

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 monochromatic source emits light of wavelength 500 nm and has a power output of 25 W. Find the number of photons emitted by this source in 5 minutes .

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.