To obtain interference of light, the condition which must be met is that the source must be:
Correct answer: C. Both phase coherence and monochromatic
- A. Phase coherence
- B. Monochromatic
- C. Both phase coherence and monochromatic
- D. None of these
Explanation
The correct answer is Option C. To achieve clear interference patterns, the light source must be both phase coherent and monochromatic. This combination ensures a stable phase relationship and a single wavelength, essential for distinct interference fringes. Options A, B, and D are incorrect because they do not address the necessity of both phase coherence and monochromaticity for clear interference patterns.
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About Optics
Light is studied through reflection, refraction, dispersion, interference, diffraction and polarization, linking ray behavior with its wave nature. Questions may involve mirrors, lenses, optical instruments, refractive index and image formation, while geometrical optics deals with rays and wave optics explains effects such as interference and diffraction.
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