Question

8. What are coherent sources of light? State two conditions for two light sources to be
coherent.
5. What is the (a) Momentum, (b) Speed and (c) De Broglie wavelength of an electron with
kinetic energy of 120 eV ?​

Answer 1

Answer:

If the sources have zero or constant phase difference and the same frequency, then the two sources are considered to be coherent. Most of the light sources around us like the bulb, sun, candle, etc. are a combination of a multitude of incoherent sources of light.