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In Young's double slit experiment, the two slits are separated by 0.28mm and the screen is placed at a distance of 1.4m away from the slits. the distance between the centre fringe and the fifth dark fringe is measured to be 1.35cm . calculate the wavelength of light used. Also find the fringe width if the screen is moved 0.4m towards the slits, for the same experiment set up.
Asked by mrwballari999 | 03 Jan, 2023, 09:33: AM

Given that,

d = 0.28 x 10-3 m

D = 1.4 m

xn = 1.35 cm x 10-2 m

n = 5

Now, for nth dark fringe we know that,

Also when the slit is moved 0.4 m todays the screen the fringe width will be

Answered by Jayesh Sah | 03 Jan, 2023, 01:26: PM

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