Question

The product of the time period of a wave and its frequency is

• A. Infinite
• B. Zero
• C. More than unity but less than infinity
• D. Unity

Answer 1

The correct option is D

Unity

Unity

1. Time period: The time taken to complete one oscillation of the density of the medium. It is represented by the letter ‘T’.
2. Frequency: It is the number of oscillations of the medium at a place per unit of time. It is denoted by the Greek letter $f$
3. Frequency is related the to the time period by

$$\begin{gathered} f=\frac{1}{T} \\ f\times T=1 \end{gathered}$$

Therefore, the product of the time period of a wave and its frequency is unity.

Hence, option (d) is correct.