Practice question · Multiple choice
A high-frequency wave has a SHORT period, not a long one. Why must the two run opposite ways?
Hints
- Write down the units of each quantity.
- Cycles per second against seconds per cycle.
Show the answer
D. Because frequency is cycles per second and period seconds per cycle
Why
The units settle it: . Many cycles per second means little time for each, and the reciprocal relation is forced by what the two quantities count.
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