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What will be the linear width of the central maximum on a screen that is kept 5 m away from the slit, if a light of wavelength 800 nm strikes a slit of 5 mm width.(a) 1.2 mm(b) 5.6 mm(c) 6.5 mm(d) 9.7 mmI got this question in semester exam.This intriguing question comes from Wave Optics topic in portion Wave Optics of Physics – Class 12 |
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Answer» RIGHT choice is (a) 1.2 MM The explanation is: Linear width is given as: β0 = \(\frac {2D\lambda }{d}\) β0 = \( \frac { ( 2 \times 5 \times 800 \times 10^{-9} ) }{ (5 \times 10^{-3} ) }\) β0 = 1.6 × 10^-3 m β0 = 1.6 mm Therefore, the linear width of central maximum on a SCREEN kept 5 m away from the slit is 1.6 mm. |
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