Question

What is the relation between frequency $\left(\nu \right)$, wavelength $\left(\lambda \right)$ and speed of the wave $\left(c\right)$ ?

• A. $\nu =c\lambda$
• B. $\nu =\frac{c}{\lambda }$
• C. $\nu =\frac{\lambda }{c}$
• D. $\nu =\frac{2c}{\lambda }$

Answer 1

Answer: (B)

$\nu =\frac{c}{\lambda }$

Definition of frequency of a wave:
Frequency is the number of complete vibration cycles of a medium in one second.

In one cycle it covers distance equal to its wave length.

$\lambda =cT$ where T is time period which is related to frequency as $T=\frac{1}{\nu }$