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QJEEM19Ph1c4d: JEE Main 2019 Physics - Class 12 JEEM19Ph1c4d Solution: Consider a Young’s double slit experiment as shown in figure.…

Consider a Young’s double slit experiment as shown in figure. What should be the slit separation d in terms of wavelength λ such that the first minima occurs directly in front of the slit (S1) ?

JEE Main 2019 (Online) 10th January Evening Slot Physics - Wave Optics Question 111 English

Multiple Choice Options

  • A λ2(5−2)
  • B λ2(5−2)
  • C λ(5−2)
  • D λ(5−2)

Step-by-Step Verified Solution

Path difference, S2P – S1P = λ2

⇒ 4d2+d2−2d=λ2

⇒ d(5−2)=λ2

⇒ d = λ2(5−2)

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