Coherent sources of light mean:
Correct answer: C. Single wavelength
- A. Multiple wavelength
- B. Double wavelength
- C. Single wavelength
- D. Coherent photons
Explanation
The sources that produce waves having the same frequency, equal or comparable amplitude, and a constant phase difference are called coherent sources. A coherent source has only a single wavelength.
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About Superposition and Interference
Superposition states that overlapping waves produce a resultant displacement equal to the algebraic sum of their individual displacements. Interference covers constructive and destructive interference, phase difference, path difference, coherent sources, and conditions for maxima and minima. It differs from diffraction, which involves spreading around openings or obstacles.
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