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IGCSE · 3 · multiple choice

Waves · Question 4

Waves · Original GioPhysics question with a detailed, mark-by-mark answer guide.

Demand
recall
Marks
1
Topics
1
Answer
Complete
multiple choice1 mark

Which list places these electromagnetic waves in order of increasing frequency?

  1. A

    infrared, microwaves, ultraviolet, X-rays

  2. B

    microwaves, infrared, ultraviolet, X-rays

  3. C

    X-rays, ultraviolet, infrared, microwaves

  4. D

    ultraviolet, X-rays, microwaves, infrared

Ready to self-mark?Reveal the detailed answer guide
Answer overviewCorrect answer: B — microwaves, infrared, ultraviolet, X-rays
01

Answer and reasoning

1 mark
How to approach it

Predict from the governing principle before looking for a matching option. Then reject alternatives by checking direction, units, limiting behaviour or the physical meaning of each statement.

  1. 1

    The correct choice is B: microwaves, infrared, ultraviolet, X-rays

  2. 2

    A swaps the first pair, which is the pair candidates most often reverse. C is the correct order of decreasing frequency, offered for anyone who reads the question too quickly.

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