Skip to content

Course home

Sign up

Refraction, diffraction and interference

EasyMedium
123456789101112131415161718192021222324252627
Question 19

In a Young's double-slit experiment, light of wavelength λ \lambda\,λ passes through a double slit with separation d d\,d and projects an interference pattern onto a screen at a distance LLL. The distance between consecutive bright fringes is www.

The experiment is modified as follows:

  • The wavelength of the light is increased to 1.5λ1.5\lambda1.5λ.
  • The separation of the double slits is doubled to 2d2d2d.
  • The distance between the double slits and the screen is tripled to 3L.

What is the new fringe spacing in terms of the original spacing www?

A

0.25w0.25w0.25w

B

0.75w0.75w0.75w

C

2.25w2.25w2.25w

D

4.5w4.5w4.5w

Markscheme

Refraction, diffraction and interference Questions

  1. A Level
  2. /Physics
  3. /Refraction, diffraction and interference

37 exam-style questions on AQA A Level Physics Refraction, diffraction and interference, covering Interference, Diffraction, and Refraction at a plane surface. Each one has a worked solution and a mark scheme showing where the marks go.

Question bank