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Asked in ETEA MDCAT 2019 2019

The general form of path difference in young's double slit experiment is "mλ" Its corresponding phase shift (in radians) is

Correct answer: B. 2 mπ

  • A. mπ
  • B. 2 mπ
  • C. mπ/2
  • D. None

Explanation

Factual. General form for path difference is given as =2𝞹 Option A, C and D are not correct according to this.

This question appeared on the ETEA MDCAT 2019 paper, which you can sit online with every answer explained.

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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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