First slide

Young's double slit Experiment

Question

$\begin{array}{l} In YDSE, the two slits are separated by 0 .1 mm and they are 0 .5 m from the screen . The wavelength of light used is 5000 \overset{0}{A} . \\ Find the distance of 11th dark from the central maximum of the screen. \end{array}$

Moderate

Solution

$\begin{array}{l} {(y_{n})}_{d a r k} = \frac{(2 n - 1) λ D}{2 d} \\ y_{11} = \frac{21 \times 5 \times 10^{- 7} \times 0.5}{2 \times 10^{- 4}} = 26.25 m m \end{array}$

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