Question

Explain why the two sources of light must be of equal intensity to obtain well defined interference pattern.

Answer 1

Intensity is the Number of photons traveling through a area per second.. If intensity is different we will not observe black fringes..as the light with more intensity will shine brighter.

Answer 2

Hey dear,

◆ Explanation -

- Intensity of light is directly proportional to square of its amplitude.

- For obtaining black fringes, two light waves must cancel each other.

- For this to occur, both waves should have same amplitude with opposing phase.

- Therefore, to obtain well-defined interference pattern, two sources of light must emit light of equal intensity.

Hope this helped. Thanks for asking..