NEET2015PhysicsWave OpticsActual
In a certain double slit experimental arrangement, interference fringes of width 1 ~mm each are observed when light of wavelength 5000 Å is used. Keeping the setup unaltered, if the source is replaced by another of wavelength 6000 Å , the fringe width will be
Options
- A1.2 ~mm
- B0.5 ~mm
- C1 ~mm
- D1.5 ~mm
Correct answer
A. 1.2 ~mm
Step-by-step solution
Fringe width, = D d Since D and d are unaltered, . aligned & ^ = ^ & or ^ = ^ =1 6000 5000 =1.2 ~mm aligned