O-LevelPhysicsLight5054/21 · Oct/Nov 2019 · Q46 Marks
Fig. 4.1 represents the electromagnetic spectrum. [Figure 4.1] The shaded region in the middle is the visible light spectrum.
- (a)State the name of the component labelled: • A • B • C[2]
- (b)State the name of the component of the electromagnetic spectrum that has: the greatest frequency the smallest wavelength[1]
- (c)Explain how X-rays are used to produce an image of a broken bone in a patient's leg.[3]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (Oct/Nov 2019). The mark or mark type is shown in brackets.
- [C1] (A:) ultraviolet (radiation) (B:) infra-red (radiation) (C:) microwaves any two correct
- [A1] all three correct
- [B1] gamma-rays and gamma-rays
- [B1] X-rays pass through flesh and not (to the same extent) through bone
- [B1] X-rays detected photographically or (digital) detector behind bone
- [B1] no / less exposure / detection reveals bone or exposure / detection reveals break
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