Question

- Optics
NEET & AllMS
S: A beam of light of wavelength 400 nm falls on a narrow slit and the resulting diffraction pattern
is observed on a screen 2m away from the slit. It is observed that 2nd order minima occurs at
a distance of 2 mm from the position of central maxima. Find the width of the slit.​

Answer 1

Answer:a=0.8 mm

Explanation:

Q=2×10^-3/2=10^-3

Now second order minima Q=2×wavelength /a

A=0.8 mm