Question:

A slit of width ‘a’ is illuminated by red light of wavelength 6500 A°. If the first diffraction minimum falls at 30°, then the value of ‘a’ is ________

Updated On: Apr 17, 2024
  • 6.5 × 10-4 mm
  • 1.3 micron
  • 3250 A°
  • 2.6 × 10-4 cm
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The Correct Option is B

Solution and Explanation

The correct answer is (B) : 1.3 micron.
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