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 b
Answer
Answer outline and marking scheme
for question: 4
(a) (i) particle having same mass & opposite charge
e.g . electron/positron
(ii) matter and antimatter combine to give photons only [4 marks]
(b) (i) E insert symbol
(ii) E = hf =1/2 x (1.64 x 10exp-13 / (6.63 x 10exp-34) = 1.24 x
10exp20 Hz
[5 marks]
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