Optics Question 861

Question: In YSDE, both slits are covered by transparent slab. Upper slit is covered by slab of R.I. 1.5 and thickness t and lower is covered by R.I. 43 and thickness 2t, then central maxima

Options:

A) shifts in +ve y-axis direction

B) shifts in -ve y-axis direction

C) remains at same position

D) may shift in upward or downward depending upon wavelength of light

Show Answer

Answer:

Correct Answer: B

Solution:

[b] Δx1=(μ11)t=(1.51)t=0.5t

and Δx2=(μ21)×2t=(431)×2t=23t

As Δx2>Δx1 , so shift will be along -ve v-axis.



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