First slide

Young's double slit Experiment

Question

In young's double slit experiment the angular width of a fringe formed on a distant screen is $1^{o}$ . The wavelength of light used is $6000 \overset{o}{A}$ . What is the spacing between the slits?

Easy

A

0.034 mm
B

0.108 mm
C

1.08 mm
D

0.1344 mm

Solution

Angular width of fringe (in radian) $= \frac{λ}{d}$
$∴ \frac{π}{180} = \frac{6000 \times 10^{- 10}}{d} \Rightarrow d = 0.034 m m$

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