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Question 19M.1.HL.TZ1.30

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Date May 2019 Marks available [Maximum mark: 1] Reference code 19M.1.HL.TZ1.30
Level HL Paper 1 Time zone TZ1
Command term Question number 30 Adapted from N/A
30.
[Maximum mark: 1]
19M.1.HL.TZ1.30

The headlights of a car emit light of wavelength 400 nm and are separated by 1.2 m. The headlights are viewed by an observer whose eye has an aperture of 4.0 mm. The observer can just distinguish the headlights as separate images. What is the distance between the observer and the headlights?

A. 8 km

B. 10 km

C. 15 km

D. 20 km

[1]

Markscheme

B

Examiners report

Response B was the most common (correct) response, with responses A and C as equally significant distractors.

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