In double slit experiment if one of the two slit is covered then________________?
Correct answer: A. no interference fringes are observed
- A. no interference fringes are observed
- B. no diffraction fringes are observed
- C. no fringes observed
- D. interference pattern not disturbed
Explanation
Double-slit interference requires light from both slits, so covering one slit removes the interference fringes. A single slit can still produce a diffraction pattern, which is why the statement specifically about interference is correct. Students may choose c by forgetting that single-slit diffraction fringes remain.
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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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