In YDSE how many maxima can be obtained on the screen if wavelength of light used is 200nm and d = 700 nm:
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Question

In YDSE how many maxima can be obtained on the screen if wavelength of light used is 200nm and d = 700 nm:

G1 Physics · Accepted Answer

Bright fringes satisfy d sinθ=mλ. With d/λ=700/200=3.5, possible integer orders are m=−3,−2,−1,0,1,2,3. Total maxima=7. Option B.