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Interference of Light: Difference situations

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If you punched a metal plate with two pinholes and illuminated them with light, would you see interference fringes if you used:

(a) laser light, or

(b) light from an LED (light emitting diode) ?

(c) sunlight ?

(d) spontaneous emission coming out the side of the He-Ne laser ?

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Solution Preview

The answer is (a) only

The phenomenon of interference is observed due to superposition of two monochromatic coherent waves, traveling in same direction in the medium.

Monochromatic light means the light of a single ...

Solution Summary

The interference in different situations is discussed. Two pinholes and illuminated lights are interference are examined.