Physics (AS & A Level) · Oct / Nov 2016 · Paper 42 · Question 12
9702
As printed in the paper
Show the answer and mark scheme
12(a)(i)[1]
electron diffraction/electron microscope (allow other sensible suggestions) [1]
12(a)(ii)[1]
photoelectric effect/Compton scattering (allow other sensible suggestions) [1]
12(b)(i)[1]
arrow clear from –0.54 eV to –3.40 eV [1]
12(b)(ii)[2]
E = hc / λ or E = hf and c = fλ λ = (6.63 × 10–34 × 3.00 × 108) / [(3.40 – 0.54) × 1.60 × 10–19] = 4.35 × 10–7 m [2]
12(c)(i)[2]
wavelength associated with a particle that is moving/has momentum/has speed/has velocity [2]
12(c)(ii)[2]
λ = h / mv v = (6.63 × 10–34) / (9.11 × 10–31 × 4.35 × 10–7) = 1.67 × 103 m s–1 [2]
13 X-ray image of a (single) slice/cross-section (through the patient) taken from different angles/rotating X-ray (beam) computer is used to form/process/build up/store image 2D image (of the slice) repeated for many/different (neighbouring) slices to build up 3D image [6]
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.