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CGP EDU Academic Team
Published on: August 11, 2026
A parallel beam of monochromatic light is incident on a narrow rectangular slit of width 1 mm . When the diffraction pattern is seen on a screen placed at a distance of 2 m , the width of principal maxima is found to be 2.5 mm . The wavelength of light is
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Text Solution
Verified by ExpertsThe correct answer is:
A
Here the width of principal maxima is 2.5 mm Then its half width is 
From (i) & (ii)
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