H2P-222
Principle of superposition
H2 Physics · JC 1 · Easy · Principle of superposition
Two ordinary lamps of the same colour are placed side by side. No stable interference fringes are seen on a nearby screen. What is the main reason?
- The phase difference between the lamps changes randomly with time
- The lamps do not emit light of a single frequency
- The intensities of the lamps are not equal
- The lamps are not point sources
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