Question

read the section \frequency and period.\ select the detail from the section that shows the difference between frequency and period. a the frequency of a wave is the number of waves passing a fixed point in a given amount of time. it can be measured by counting the number of crests (or troughs) passing a point per second. b frequency can also be expressed using the unit hertz (hz). one hertz equals one cycle per second. c a waves frequency is closely related to its period. the period of a wave is the time it takes for one complete wave (that is, one crest plus the next trough) to pass a given point. d note that period measures how long (in seconds) it takes for one wave to occur. frequency measures how many waves occur per second.

Explanation:

To determine the detail showing the difference between frequency and period, we analyze each option:

• Option A: Only defines frequency, not showing the difference with period.
• Option B: Describes the unit of frequency, not the difference with period.
• Option C: Mentions the relationship but focuses more on defining each without a clear difference statement.
• Option D: Clearly states that period measures the time for one wave to occur and frequency measures the number of waves per second, directly showing the difference.

Answer:

D. Note that period measures how long (in seconds) it takes for one wave to occur. Frequency measures how many waves occur per second.