JEE Main 2017 — Wave Optics Question with Solution
From: JEE Main 2017 (Online) 9th April Morning Slot
Question
A single slit of width 0.1 mm is illuminated by a parallel beam of light of wavelength 6000 and diffraction bands are observed on a screen 0.5 m from the slit. The distance of the third dark band from the central bright band is :
Choose an option
Show full solutionCorrect option: B
Correct answer
B9 mm
Step-by-step explanation
The slit width is a = 0.1 mm = 104 m.
The wavelength of the light is = 6000 1010 = 6 107.
The distance from the slit to diffraction bands is D = 0.5 m.
We calculate the third dark band from the central band as follows:
mm
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This is a previous-year question from JEE Main 2017, covering the Wave Optics chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.