Target Exam

CUET

Subject

Physics

Chapter

Wave Optics

Question:

In a Young's double slit experiment, angula width of a fringe formed on a distant screen is 0.1°. If wavelength of light used is 6000 Å , then distance between the slits will be

Options:

0.241 mm

0.344 mm

0.519 mm

0.413 mm

Correct Answer:

0.344 mm

Explanation:

$θ=\frac{λ}{d}$ or $d=\frac{λ}{θ}$

or $d=\frac{6×10^{-5}×180×7}{0.1×22}=0.344mm$