In a Young’s double slit experiment, the slits are placed 0.320 mm apart. Light of wavelength λ = 500 mm is incident on the slits. The total number of bright fringes that are observed in the angular range −30° ≤^{ }θ ≤ 30°^{ }is

In a Young’s double slit experiment, the slits are placed 0.320 mm apart. Light of wavelength λ = 500 mm is incident on the slits. The total number of bright fringes that are observed in the angular range −30° ≤^{ }θ ≤ 30°^{ }is

1 Answer

127 votes

Pam difference

dsinθ = nλ

where d= separation of slits

λ = wave length

n= no. of maximas

0.32 × 10^{−3 }sin 30 = n = 500 × 10^{−9 }

^{ } N= 320

Hence total no. of maxmias observed in angular range −30°^{ } ≤ θ ≤ 30°^{ }is

Maximas = 320 + 1 + 320 = 641

127 votes

127