For Young's double slit experiment, two statements are given below [NEET 2023]
Statement I: If screen is moved away from the plane of slits, angular separation of the fringes remains constant.
Statement II: If the monochromatic source is replaced by another monochromatic source of larger wavelength. the angular separation of fringes decreases.
In the light of the above statements, choose the correct answer from the options given below
Text Solution
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Angular separation of fringes, 
i.e. Angular separation does not depend on the distance between screen and plane of slits. Thus, Statement I is correct.
Since, 
Thus, if the monochromatic source is replaced by another monochromatic source of larger wavelength, then angular separation of fringes increases. Hence, Statement II is incorrect.
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