Why cannot the phenomenon of interference be observed by lilluminating two pin holes with two sodium lamps ?

To demonstrate the phenomenon of interference, we require two sources which emit radiation

What happens to the interference pattern if the two slits in Young's experiment are illuminated by two independent sources such as two sodium lamps S and S' as shown in figure

Why is it not possible to have interference between the waves produced by two violins ?

For the sustained interference of light, the necessary condition is that the two sources should

For the sustained interference of light, the necessary condition is that the two sources should

The two slits in Young's double slit experiment are illuminated by two different sodium lamps emitting light of the same wavelength. No interference pattern will be observed on the screen.

Answer the following: (a) what are coherent sources of light ? Two slits in Young's double slit experiments are illuminated by two different sodium lamps emitting light of the same wavelength. Why is no interference pattern observed? (b) Obtain the condition for getting dark and bright fringes in Young's experiment. Hence write the expression for the fringe width. (c) If s is the size of the source and its distance from the plane of the two slits, what should be the criterion for the interference fringes to be seen?

To empty an oil tin, two holes are made, why ?

Two incoherent sources of light each with equal intensity I_(0) interfere in a medium . Will any interference pattern be observed ? If no, then why ? Also what would be resultant intensity then ?

Why does the sum appear reddish early in the morning ? Will this phenomenon be observed by an observe on the moon ? Justify your answer with a reason.