NEET2015PhysicsWave OpticsActual
In a double-slit experiment, the two slits are 1 mm apart and the screen is placed 1 m away. A monochromatic light of wavelength 500 nm is used. What will be the width of each slit for obtaining ten maxima of double-slit within the central maxima of a single-slit pattern?
Options
- A0 . 2   mm
- B0 . 1   mm
- C0 . 5   mm
- D0 . 02   mm
Correct answer
A. 0 . 2   mm
Step-by-step solution
d   = 1   mm = 1 × 10 - 3   m D = 1   m . ,         λ = 500 × 10 - 9   m Width of the central maximum = width of 10 maxima in YDSE 2 λ D a = 10 λ D d a = 0.2 d = 0 .2   mm