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MHT CET Physics question

PhysicsWave OpticsMHT CET

In an interference experiment, third bright fringe is obtained at a point on the screen with a light of 700 nm. What should be the wavelength of the light source in order to obtain 5 th bright fringe at the same point? [MHTCET 2010]

Answer: (D)

Solution

Same position means , so

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Question ID VK-077397