State the conditions to get steady interference pattern.
- The two sources of light must be coherent, i.e., there is a constant phase difference between the light waves emitted by the two sources. (This condition is met only if the two sources are derived from the same source.)
- The two sources of light must be monochromatic, i.e., the light emitted is of the same wavelength.
- The light waves emitted by the two sources must be of equal amplitudes or the sources must be of same intensity.
- The two sources must be narrow. Point sources of light in the form of illuminated slits are used.
- The two sources should be close to (near) each other.
- The two sources should emit waves in nearly the same direction.
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Solution State the Conditions to Get Steady Interference Pattern. Concept: Interference of Light.