Question 378: Wave Optics

Question

In Fraunhofer diffraction pattern, slit width is 0.2 mm and screen is at 2m away from the lens. If wavelength of light used is 5000$$\mathop A\limits^o $$ then the distance between the first minimum on either side of the central maximum is ($$	heta$$ is small and measured in radian)

Accepted Answer

Distance between the first minima $$ = {{2\lambda D} \over a} = {{2 	imes 5 	imes {{10}^{ - 7}} 	imes 2} \over {0.2 	imes {{10}^{ - 3}}}} = {10^{ - 3}}$$ m

Answer

2 $$	imes$$ 10$$^{-2}$$ m

Answer

10$$^{-1}$$ m

Answer

10$$^{-2}$$ m

Answer

10$$^{-3}$$ m

Wave Optics

In Fraunhofer diffraction pattern, slit width is 0.2 mm and screen is at 2m away from the lens. If wavelength of light used is 5000$\mathop A\limits^o then the distance between the first minimum on either side of the central maximum is (\theta$ is small and measured in radian)

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