The bright and dark bands you see in a photograph of a double slit interference

Question

The bright and dark bands you see in a photograph of a double slit interference pattern represent:

a.the respective positions of the crests and the troughs of the light wave.

b.the respective positions of destructive and constructive interference of light from the two sources.

c.an interference pattern that is not present unless it is produced by the camera lens.

d.the respective positions of bright and dark particles of light.

e.the respective positions of constructive and destructive interference of light from the two sources.

Explanation / Answer

b.the respective positions of destructive and constructive interference of light from the two sources

The wave nature of light causes the light waves passing through the two slits to interfere, producing bright and dark bands on the screen—a result that would not be expected if light consisted of classical particles.However, the light is always found to be absorbed at the screen at discrete points, as individual particles (not waves), the interference pattern appearing via the varying density of these particle hits on the screen

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