Note AcademyNote Academy
Start

Physics (AS & A Level) · Oct / Nov 2022 · Paper 12 · Question 30

9702The diffraction grating

Red light of a single wavelength passes through a diffraction grating. Bright dots are formed on a screen, as shown. The red light is replaced with white light. Which diagram, drawn to the same scale, shows a possible pattern of bright light on the screen?

  1. ASeven evenly spaced small dots
  2. BThree evenly spaced small dots
  3. CCentral small dot with elongated coloured bands on either side
  4. DCentral small dot with elongated coloured bands on either side (wider spacing)

As printed in the paper

Show the answer

Correct answer: D. Central small dot with elongated coloured bands on either side (wider spacing)

Sit this whole paper →More on The diffraction grating

Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.