Question

Find energy of each of the photons which

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

A 25 watt bulb emits monochromatic yellow light of wavelength of 0.57µm. Calculate the rate of emission of quanta per second.

Nitrogen laser produces a radiation at a wavelength of 337.1 nm. If the number of photons emitted is 5.6 × 1024, calculate the power of this laser.