NEET2018PhysicsWave OpticsActual
In a single slit diffraction the distance between plane of slit and screen is 1 ~m . The size of the slit is 0.7 ~mm and second maximum is formed at the distance of 2 ~mm from the centre of the screen, then find out the wavelength of light.
Options
- A5600 Å
- B2800 Å
- C3000 Å
- D6000 Å
Correct answer
A. 5600 Å
Step-by-step solution
For second maxima path difference, aligned & a = 5 2 ; a y D = 5 2 & = 2 a y 5 D = 2 0.7 10⁻³ 2 10⁻³ 5 1 & = 2.8 5 10⁻⁶ ~m = 28 5 10⁻⁷=5600 Å & aligned