Quelpr
2 marksParticulate Nature of Electromagnetic Radiation

CAPE Physics Unit 2 · 2006 · Paper 1 · Question 8(a)

Electron diffraction in an electron beam tube.

Show on the screen of Figure 10 the diffraction pattern observed when electrons pass through the graphite sheet.

This question uses a figure or table from the paper — you'll see it when you practise.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 8(b)Calculate the speed of the electrons after being accelerated through a potential difference of 3000 V.[3 marks]
  2. 8(c)Calculate the de Broglie wavelength of the electrons emitted from the anode.[3 marks]
  3. 8(d)Describe what changes would be observed in the diffraction pattern on the screen if the accelerating voltage were decreased.[2 marks]

More practice: the rest of this paper · more Particulate Nature of Electromagnetic Radiation questions · all CAPE Physics Unit 2 past papers