Question

Which of the following is a form of light whose photons share the same frequency and whose wavelengths are in phase with one another?

(a) Coherent sources

(b) Incoherent sources

(c) Electromagnetic waves

(d) Sunlight

The question was posed to me in my homework.

I'd like to ask this question from Coherent and Incoherent Addition of Waves in chapter Wave Optics of Physics – Class 12

Answer 1

Right option is (a) Coherent sources

The best I can explain: Coherent light is a form of light whose photons share the same frequency and whose wavelengths are in phase with one another. The phase difference between the waves should be constant in case of coherent sources.