Question

A certain electromagnetic radiation has a wavelength of 5.4x10-7m. What is the frequency of this

electromagnetic radiation?
O 1.8 x 10-65-1
O 5.6 x 1014 5-1
O 1.6 x 1011 51
O 1.8 x 10-155-1
O 5.6 x 10551

Answer 1

5.6 x 10¹⁴m

Step-by-step explanation:

Given parameters:

Wavelength = 5.4 x 10⁻⁷m

Unknown:

Frequency of the electromagnetic radiation = ?

Solution:

The speed of all electromagnetic radiation is given as 3.0 x 10⁸m/s

So;

Speed = frequency x wavelength

Wavelength =
`(speed)/(frequency)`

Insert the parameters and solve;

Wavelength =
`(3 x 10^(8) )/(5.4 x 10^(-7) )`

Wavelength =
`(3)/(5.4)` x 10⁸⁻⁽⁻⁷⁾

Wavelength = 5.6 x 10⁻¹ x 10¹⁵

Wavelength = 5.6 x 10¹⁴m