Question

The laser in a 3D printer uses light with a frequency of 3.844 × 1014 Hz. Calculate the wavelength of this light in nm. Show all your calculations. (Hint: Remember the speed of light!)

Answer 1

Answer:

The wavelength of this light is 780.4 nm.

Explanation:

Given that,

The frequency of laser light, $f=3.844 \times 10^{14}\ Hz$

We need to find the wavelength of this light.

We know that,

$c=f\lambda$

Where

$\lambda$ is the wavelength of light

So,

$\lambda=\dfrac{c}{f}\\\\\lambda=\dfrac{3\times 10^8}{3.844 \times 10^{14}}\\\\=7.804\times 10^{-7}\ m\\\\=780.4\ nm$

So, the wavelength of this light is 780.4 nm.