Question

An electromagnetic wave has a wavelength of 6.11 ✕ 10−5 m. What is the frequency of the wave (in Hz)? answer in:___ Hz In what region of the electromagnetic spectrum is this radiation? a.)Infrared b.)Visible c.)Ultraviolet d.)X-rays

Answer 1

We are given the wavelength of an electromagnetic wave which is 6.11×10-5 m.

We are asked to determine its frequency.

Recall that the relationship between wavelength and frequency is given by

$f=\frac{v}{\lambda}$

Where λ is the wavelength, f is the frequency, and v is the speed of light.

The speed of light is 3.00×10^8 m/s

$f=\frac{3.00\times10^8}{6.11\times10^{-5}}=4.91\times10^{12}\;Hz$

Therefore, the frequency of the wave is 4.91×10^12 Hz.

We are also asked in which region of the electromagnetic spectrum is this radiation.

The above frequency range (4.91×10^12 Hz) is in the infrared region of the electromagnetic spectrum.

Therefore, option a.) Infrared is the correct answer.