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JEE Main 2004 (AIEEE) · YDSE: Film, Medium & Two Wavelengths

YDSE: Film, Medium & Two Wavelengths question from JEE Main 2004 (AIEEE)

Q71JEE Main 2004 · AIEEEMedium

YDSE: Film, Medium & Two Wavelengths

The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young's double-slit experiment, is:

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Answer: (b)

  1. Maxima: dsin⁡θ=nλ⇒sin⁡θ=n2d\sin\theta = n\lambda \Rightarrow \sin\theta = \dfrac{n}{2} with ∣sin⁡θ∣≤1|\sin\theta| \le 1.
  2. Allowed n=0,±1,±2n = 0, \pm1, \pm2.
  3. So the answer is (b) five.
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