MHT CET202120 Sep 2021Evening ShiftPhysicsWave OpticsActual
In Fraunhofer diffraction pattern, slit width is 0.2 ~mm and screen is at 2 ~m away from the lens. If wavelength of light used is 5000 Å then the distance between the first minimum on either side of the central maximum is ( is small and measured in radian)
Options
- A2 10⁻² ~m
- B10⁻¹ ~m
- C10⁻² ~m
- D10⁻³ ~m
Correct answer
C. 10⁻² ~m
Step-by-step solution
Distance between the first minima on either side of the central maximum = 2 D a = 2 5 10⁻⁷ 2 0.2 10⁻³ =10⁻² ~m