JEE Main 2013 Physics question
This question has Statement-1 and Statement-2. Of the four choices given after the Statements, choose the one that best describes the two Statements. Statement-1: In Young's double slit experiment, the number of fringes observed in the field of view is small with longer wavelength of light and is large with shorter wavelength of light. Statement-2: In the double slit experiment the fringe width depends directly on the wavelength of light.
Answer: (1)
Solution
Fringe width is proportional to λ (Statement 2 true). In a fixed field of view, wider fringes (longer λ) mean fewer fringes and narrower fringes (shorter
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