PLEASE SHOW WORKING OR GIVE AN EXPLANATION FOR YOUR ANSWER In Young\'s double sl

Question

PLEASE SHOW WORKING OR GIVE AN EXPLANATION FOR YOUR ANSWER In Young's double slit experiment, an extended source is used to produce reasonably coherent light at the double slit. The distance between the source and the double slits is r - 1.0 m and the wavelength is lembda = 550 nm. It is noticed that the maximum slit separation to observe fringes is ls = 1.6x1 O-5 m. What is the width S of the source? less than 0.01 m. 0.01 m or more but less than 0.05 m. 0.05 m or more but less than 0.1 m. more than 0.1 m.

Explanation / Answer

Given: The distance between the source and screen L = 1.0 m wavelength of the source () = 550 nm seperation between the slits d = 1.6*10-5 m ....................................................................................................................... from the Young Double Slit experiment . wavelength () = xd/nL   ........... (1) here x distance from the central fringe. d is distance between the slits L is the distance between slits and screen is the wavlength of incident light x = nL / d here n = 1 taking    = (1.0m )(550 *10-9 m) / (1.6*10-5 m)   x = 0.034 m option 2 is the right one.

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