Question

What are the coherent sources of light? Can two independent sodium lamps act like coherent sources? Explain.

Hint:

- Coherent sources emit waves with: - A constant phase difference. - The same frequency. - Two independent sodium lamps cannot be coherent sources because their emissions are random and do not maintain a constant phase relationship. - Coherent light can be obtained from a single source, such as using a beam splitter to create two coherent beams.

Answer 1

Coherent Sources of Light 
Coherent sources of light are sources that emit waves with: 
 A constant phase difference, 
The same frequency.

 Explanation: Two independent sodium lamps cannot act as coherent sources because their emissions are random and do not maintain a constant phase difference. Only light derived from a single source (e.g., using a beam splitter) can produce coherent sources.