MHT CET202013 Oct 2020Evening ShiftPhysicsWave OpticsActual
A parallel beam of monochromatic light of wavelength 5 10⁻⁷ ~m is incident normally on a single narrow slit of width 10⁻³ ~mm . At what angle of diffraction, the first minima is observed?
Options
- A⁻¹ ( 1 2 )
- B⁻¹(1)
- C⁻¹ ( 3 2 )
- D⁻¹ ( 1 2 )
Correct answer
D. ⁻¹ ( 1 2 )
Step-by-step solution
= a = 5 10⁻⁷ ~m 10⁻⁶ ~m =0.5= 1 2 = ⁻¹ ( 1 2 )