Question 23
Question 23 of 40
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No letter options?
Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.
A 1, 2 and 3 are correct
B 1 and 2 only are correct
C 2 and 3 only are correct
D 1 only is correct
Topics Tested
7. Waves
7.4. Electromagnetic spectrum

state that all electromagnetic waves are transverse waves that travel with the same speed c in free space

11. Particle physics
11.1. Atoms, nuclei and radiation

describe the composition, mass and charge of α-, β- and γ-radiations (both β− (electrons) and β+ (positrons) are included)

24. Medical physics
24.2. Production and use of X-rays

explain that X-rays are produced by electron bombardment of a metal target and calculate the minimum wavelength of X-rays produced from the accelerating p.d.