The number of bright fringes due to diffraction having wavelength of light 650 nm
Moselq8
Answered question
2022-08-13
Answer & Explanation
Irene Simon
Beginner2022-08-14Added 16 answers
Angle of diffraction for first dark fringe = angle of interference form order of fringes
Let's plug all values
(for integral part only)
This is the number of fringes due to interference on one side and the same number on fringes would happen on other side and one fringe on the central part on the screen.
Thus, total number of fringes
N=12(for one side) + 12 (for other side) + 1 (central) = 25
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