Physics · Oct / Nov 2021 · Paper 41 · Question 6
0625
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The question as text
X‑rays are electromagnetic waves. Fig. 6.1 shows the position of X‑rays in the electromagnetic spectrum arranged according to increasing wavelength. increasing wavelength gamma-rays X-rays J K L microwaves visible light Fig. 6.1
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6(a)(i)[2]
(J) ultraviolet (radiation)
(K) infrared (radiation)
(L) radio (waves)
two correct
all three correct
6(a)(ii)[1]
L or radio (waves)
6(b)[3]
(c =) 3.0 × 108 (m / s) seen
(f =) v / λ in any form or 3.0 × 108 / 1.2 × 10–9
2.5 × 1017 Hz
6(c)(i)[3]
stated medical use (e.g. treating cancer / X-ray shadowgraph / sterilising equipment)
statement of what happens to the X-rays (e.g. absorbed by tumour / bones / bacteria)
stated consequence (e.g. tumour killed or image / picture / shadow / photograph produced)
6(c)(ii)[1]
can cause burns / (cell) mutation / cell damage / tumours / cancer / damages DNA etc.
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