Question

What is the frequency of light for which the wavelength is 7.1 × 102 nm?

Answer 1

Answer:

Frequency, $f=4.22\times 10^{14}\ Hz$

Explanation:

Given that,

Wavelength of the light,

$\lambda=7.1\times 10^2\ nm=7.1\times 10^2\times 10^{-9}\ m\\\\\lambda=7.1\times 10^{-7}\ m$

We need to find the frequency of light. We know that light is an electromagnetic wave. It moves with the speed of light. So,

$c=f\lambda$

f is the frequency of light

$f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8\ m/s}{7.1\times 10^{-7}\ m}\\\\f=4.22\times 10^{14}\ Hz$

So, the frequency of light is $4.22\times 10^{14}\ Hz$. Hence, this is the required solution.