Quelpr
12 marksProperties of Waves

CAPE Physics Unit 1 · 2003 · Paper 2 · Question 7(b)(i)

Young's fringes were formed using monochromatic light and two slits with a separation of 0.55 mm. Twelve fringes occupying a distance of 16 mm were observed on a screen 1.3 m away.

Calculate the wavelength of the light used and state its colour.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 7(a)(i)State the conditions necessary to observe interference of light using TWO sources of light.[8 marks]
  2. 7(a)(ii)Describe a demonstration of Young's double slit inference.[1 mark]
  3. 7(a)(iii)State the formula for the fringe spacing and state the meaning of EACH of the terms used.[1 mark]
  4. 7(b)(ii)State whether or not there would be a bright or dark fringe at the centre of the pattern and explain your answer.[1 mark]
  5. 7(b)(iii)Describe what would be seen if ONE slit were to be covered by an opaque material.[1 mark]
  6. 7(b)(iv)Describe the effect of replacing the monochromatic light source with one of white light when using BOTH slits.[1 mark]
  7. 7(b)(v)What would be the effect on the fringes of gradually increasing the width of the single source slit?[1 mark]

More practice: the rest of this paper · more Properties of Waves questions · all CAPE Physics Unit 1 past papers