Two light sources are said to be coherent if they are ______.

Sunlight is an example of _____.

Monochromatic light has a single _________.

What characterizes the dark fringes in an interference pattern produced by light waves?

When light waves interfere constructively, what happens to the amplitude of the resulting light?

Destructive interference happens when a _______ of a wave meets a _______ of another wave at a point in space.

In order to produce a sustained interference pattern by light waves from multiple sources, which conditions must be met?

Why does interference not occur when the beams from two flashlights overlap?

Why did the scientist Young place a single slit between the light source and the double slit?

The bright and dark fringes in the double slit experiment are due to _____.