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Question 19M.3.HL.TZ1.15b

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Date May 2019 Marks available [Maximum mark: 2] Reference code 19M.3.HL.TZ1.15b
Level HL Paper 3 Time zone TZ1
Command term Suggest Question number b Adapted from N/A
b.
[Maximum mark: 2]
19M.3.HL.TZ1.15b
(b)

Suggest the advantage in medical diagnosis of using ultrasound of frequency 1 MHz rather than 0.1 MHz.

[2]

Markscheme

1 MHz waves have shorter wavelength than 0.1 MHz ✔

can probe smaller size areas of organs/have higher resolution ✔

Examiners report

In (b) the higher resolution was mentioned by only the best candidates. Some candidates mentioned the notion of “smaller penetration at higher frequencies” – correct, though again not well related to what the question was asking.

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