The number of photons of light having wave number 'x' in 10 J of energy source is :

The number of photons of light having wave number 'a' in 3J of energy source is-

The number of photons of light having wave number x in 1J of energy source is (Planck's constant =h, velocity of light = c)

The number of photons of light having wave number x in 1J of energy source is (Plank's constant=h, velocity of light =c)

The number of photons of light having wavelength 100 nm which can provide 1 J energy is nearly:

What is the number of photons of light with a wave length 4000 pm that provide 1J energy ?