O-LevelPhysicsLight5054/11 · Oct/Nov 2019 · Q251 Mark
The frequency of microwaves used in an experiment is 3.0 × 10⁹ Hz. Their speed in air is 3.0 × 10⁸ m/s. What is a possible frequency and a possible speed in air of a radio wave? frequency/Hz speed in air m/s 3.0 × 10⁵ 1500 3.0 × 10⁵ 3.0 × 10⁸ 3.0 × 10¹⁴ 1500 3.0 × 10¹⁴ 3.0 × 10⁸
A3.0 × 10⁵ Hz and 1500 m/s
B3.0 × 10⁵ Hz and 3.0 × 10⁸ m/s
C3.0 × 10¹⁴ Hz and 1500 m/s
D3.0 × 10¹⁴ Hz and 3.0 × 10⁸ m/s
✓ Correct answer
B: 3.0 × 10⁵ Hz and 3.0 × 10⁸ m/s
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