Why two independent sources cannot produce sustained interfernce?

Which coherent sources produce fine interference?

State with reason, why two independent sources of light cannot be considered on coherent sources.

Fill ups Two independent sources………………..produce interference.

Why should we have narrow sources to produce good interference fringes?

State two conditions to obtain sustained intereferance.

What is interference of light? Write two essential condition for sustained interference pattern to be produced on the screen.

Displacement current cannot produce magnetic field. (True/False)