Physics · Wave Optics
What is a necessary condition for obtaining a stable and sustained interference pattern when light waves from two source points S1 and S2 superpose?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The intensities of the two waves must be equal, and their phase difference must be zero.
- 2The intensities of the two waves must be equal, and their phase difference must be π.
- 3The intensities of the two waves must be equal, and their phase difference must be constant with time.
- 4The intensities need not be equal, but the phase difference between the two waves must remain constant with time.✓
Correct answer
The intensities need not be equal, but the phase difference between the two waves must remain constant with time.
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