Question

Question 1 of 10

Answer 1

Answer:D

Explanation:

Let $l$ be the wave length of the given wave.

Let $v$ be the speed of the given wave.

Let $f$ be the frequency of the given wave.

As we know,

$l=\dfrac{v}{f}$

Given,

$v=3\times 10^{8}ms^{-1}\\f=9.98\times 10^{7}Hz$

So,$l=\frac{3\times 10^{8}}{9.98\times 10^{7}}=3m$