Question

What is the effect on the interference fringes in a Young’s double slit experiment if the screen is moved away from the plane of the slits?

Answer 1

Explanation:

(a) When screen is moved away, D increases. therefore width of the fringes increases. However, angular separation (λ/d) remains the same. ∴ β decreases i.e., fringe width decreases.

Answer 2

Answer:

(a) When screen is moved away, D increases. therefore width of the fringes increases. However, angular separation (λ/d) remains the same. ∴ β decreases i.e., fringe width decreases