Calculate photon energies and laser photon output.

PHYSICS · Multi-part · CBSE · Physics · Dual Nature of Radiation and Matter · Dual Nature of Radiation and Matter

Problem

Calculate photon energies and laser photon output. (a) Calculate the energy, in joules and electronvolts, of a radio-wave photon of wavelength

2.5\,\text{m}

; an infrared photon of wavelength

6.0\,\mu\text{m}

; a visible photon of wavelength

623\,\text{nm}

; and an X-ray photon of wavelength

1.5\times10^{-10}\,\text{m}

. (b) A

5\,\text{mW}

laser emits light of wavelength

630\,\text{nm}

. Calculate the energy of one photon and the number of photons emitted in

1\,\text{s}