Question

If the time period of a wave increases, its frequency will

• A. increase
• B. decrease
• C. remain the same
• D. first increases then decreases

Answer 1

The correct option is B decrease

Frequency of a wave is defined as the number of wave produced to per unit time. Or mathematically,

Frequency $=$ Number of waves/ Time taken

$\nu =\frac{1}{T}$

ATQ, if $T\uparrow$ then $\nu \downarrow$ as $T\propto \frac{1}{\nu }$

$\therefore$ Option (B) is the correct answer.