What are the essential conditions for observing the interference phenomenon in the laboratory?
Interference is a wave phenomenon where two waves superimpose with each other giving rise to a constructive and destructive pattern when the crest of one wave falls on the crest of the second wave a constructive pattern is formed when the crest of a wave falls on the trough of the second wave a destructive pattern is formed.
Answer and Explanation:
The essential conditions for observing the interference phenomenon in the laboratory are
- The initial phase difference between the interfering waves must be constant or there should be no phase difference.
- The frequencies and wavelengths of the two waves should be equal otherwise the phase difference will not remain constant.
- The light must be monochromatic so that overlapping of pattern due to individual wavelength can be eliminated.
- The sources must be narrow because a broad source is equal to a large number of narrow sources.
- And finally sources of monochromatic light must be coherent.
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from CLEP Natural Sciences: Study Guide & Test PrepChapter 8 / Lesson 16