Physics (AS & A Level) · Oct / Nov 2024 · Paper 42 · Question 9
9702
As printed in the paper
The question as text
Electrons in a vacuum are accelerated from rest through a potential difference (p.d.) V to form a beam. The electrons each have mass m and charge q. The beam is incident on a graphite crystal that acts as a diffraction grating. After passing through the crystal, the beam reaches a fluorescent screen. An interference pattern is observed on this screen.
Read automatically from the paper; the printed page above is exact.
Show the answer and mark scheme
9(a)[1]
9(b)[3]
9(c)[2]
9(d)(i)[2]
9(d)(ii)[1]
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.