Quelpr
1 markProperties of Waves

CAPE Physics Unit 1 · 2014 · Paper 2 · Question 5(a)

In order for waves to produce an observable interference pattern, they must be coherent. Explain what is meant by the term 'coherent' when used in this context.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 5(b)(i)With the aid of a diagram, show that the distance, y, between the centre of the interference fringe pattern and the first bright fringe is given by y = λD/a.[5 marks]
  2. 5(b)(ii)With a pair of slits, spacing 0.20 mm, at a distance of 0.50 m from the screen, the bright fringes are 1.4 mm apart. What is the wavelength, in nm, of the…[2 marks]
  3. 5(c)(i)Find the number of rulings per mm on the grating.[4 marks]
  4. 5(c)(ii)Find the number of spectra obtained on either side of the normal.[3 marks]

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