Question

When I wave a charged golf tube at the front of the classroom with a frequency of two oscillations per second, I produce an electromagnetic wave of frequency 2Hz. What is the wavelength of this wave?

Answer 1

To solve the exercise it is necessary to take into account the concepts of wavelength as a function of speed.

From the definition we know that the wavelength is described under the equation,

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

Where,

c = Speed of light (vacuum)

f = frequency

Our values are,

$f = 2Hz$

$c = 3*10^8km/s$

Replacing we have,

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

$\lambda = \frac{3*10^8km/s}{2Hz}$

$\lambda = 1.5*10^8m$

Therefore the wavelength of this wave is $1.5*10^{8}m$