In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 Å and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20 ° . To increase the fringe angular width to 0.21 o (with same…

Question

In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light used is 5896 Å and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is 0.20 ° . To increase the fringe angular width to 0.21 o (with same λ and D ) the separation between the slits needs to be changed to

Aicharya · Accepted Answer

Angular fringe width, θ = λ d , θ 1 θ 2 = d 2 d 1 0.20 0.21 = d 2 2 ⇒ d 2 = 0.20 0.21 × 2 = 1.9 mm

In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength λ of the light…

Solution