Question

In YDSE angular fringe width is 0.1 rad wavelength of light used is 6000 $?$. Find distance between two slits.

• A. 2 ?m
• B. 3?m
• C. 5?m
• D. 6?m

Answer 1

Answer: (D)

6?m

Answer 2

Given, ? = 0.1 rad
? = 6000 $?$
And we know that,
$\theta=\frac{\lambda}{d}$
Where d = distance between slits
$d=\frac{\lambda}{\theta}=\frac{6000\times10^{-10}}{0.1}=6\times10^{-6}=6\, \mu m$