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? (a) 6.7 × 10−9m (b) 1.5 × 108m (c) 3.0 × 108m (d) 6.0 × 108m

Answer 1

To solve this problem it is necessary to apply the concepts related to Wavelength depending on the frequency and speed of light.

The equation that meets these parameters is given by

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

Where,

c = Speed of light

$\lambda = Wavelength$

f = Frequency

Our values are given as

$c = 3*10^8m/s \rightarrow$ velocity of light in free space

f = 2Hz

Replacing we have that

$\lambda = \frac{c}{f}\\\lambda = \frac{3*10^8}{2}\\\lambda = 1.5*10^8m$

Therefore the correct answer is B.