$A$ laser is a coherent source because it contains
- AMany wavelengths
- BUncoordinated wave of a particular wavelength
- CCoordinated wave of many wavelengths
- DCoordinated waves of a particular wavelength
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Similar Questions
The path difference between two interfering waves at a point on the screen is $171.5$ times the wavelength. If the path difference is $0.01029 \, cm$,find the wavelength in $\mathring{A}$.
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"If you illuminate two pinholes using two lamps, the interference pattern will not be observed" - Explain.
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