In a Young's double slit experiment, two slits are illuminated with a light of wavelength $800 \mathrm{~nm}$. The line joining $A_{1} P$ is perpendicular to $A_{1} A_{2}$ as shown in the figure. If the first minimum is detected at $P$, the value of slits separation 'a' will be:The distance of screen from slits D = 5 cm

Question

In a Young's double slit experiment, two slits are illuminated with a light of wavelength $800 \mathrm{~nm}$. The line joining $A_{1} P$ is perpendicular to $A_{1} A_{2}$ as shown in the figure. If the first minimum is detected at $P$, the value of slits separation 'a' will be:

The distance of screen from slits D = 5 cm

0.2 mm

0.5 mm

0.4 mm

0.1 mm

Solution

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