Question

Find the angular separation between the consecutive bright fringes in a Young’s double slit experiment with blue-green light of wavelength 500 nm. The separation between the slits is2·0×10-3 m.

Answer 1

Answer:

Angular separation between the consecutive bright fringes in a Young’s double slit experiment is 0.014 °

Explanation:

Given:

Wavelength of the blue-green light=λ=500×10⁻⁹ m

Separation between two slits=d=2×10⁻³ m

Let angular separation between the consecutive bright fringes be θ.

Formula :

Angular seperation=θ=β/D

=λD/dD

=λ/d,

θ=β/D=500×10⁻⁹/2×10⁻³    

 =250×10⁻⁶      

=25×10⁻⁵ radian

= 0.014°

Hence, the angular separation between the consecutive bright fringes is 0.014 degree.

Answer 2

Answer:

Explanation:

Angular separation between the conductive bright fringe =wavelength /distance between slits

So, angular width=5×10^-7/2×10-3

=2.5×10^-4