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Question 22
Question 22 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
6. Space physics
6.2.3. The Universe

Explain that the CMBR was produced shortly after the Universe was formed and that this radiation has been expanded into the microwave region of the electromagnetic spectrum as the Universe expanded

3. Waves
3.3. Electromagnetic spectrum

Know that the speed of electromagnetic waves in a vacuum is 3.0 × 10⁸ m/s and is approximately the same in air