Calculate the energy of one of the photons of a beam of light having wavelength 25.0 `mu`m.

Calculate the energy of a photon of light having frequency of 6 x 10^15 s-1

Calculate the energy of a photon of llight having frequency of 2.7 (10*13 ) S-1

Calculate the mass of a photon of sodium light having wavelength 5894 angstrom and velocity 3 (10*8)ms-1.

Find the energy of each of the photon which have wavelength of 0.50 A*

Calculate energy of one mole of photons of radiation whose frequency is 5 x 10^(14) hz

Calculate the photon energy in electron- volt for radiation of wavelength 1 metre.

There are two sources of light, each emitting with a power of 100 W. One emits X-rays of wavelength 1nm and the other visible light of 500 nm. Find the ratio of number of photons of X-rays to the photons of visible light of the given wavelength?