NEET Physics Question - Wave Optics - Young's Double Slit Experiment

Assertion (A): The central fringe is bright or dark, it dependents on the initial phase difference between the two coherent sources.

Reason (R): The pattern and position of fringes always remains same even after the introduction of transparent medium in a path of one of the slit.

Both (A) & (R) are true and the (R) is the correct explanation of the (A)

Both (A) & (R) are true but the (R) is not the correct explanation of the (A)

(A) is true but (R) is false

Both (A) and (R) are false

Solution:

Assertion (A) is true. The nature of the central fringe depends on the initial phase difference. Reason (R) is false. Introducing a transparent medium causes a path difference \((n-1)t\) and shifts the entire fringe pattern.

Rankers Physics

Central Fringe and Transparent Medium

Solution:

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