Activity sheet 2 Week 2 Calculations on Speed, Wavelength and Frequency
Directions: Solve the given problems using the equations below. Show your solution.
Use GUFSA (Given, Unknown, Formula, Solution, Answer)
The speed of electromagnetic waves in a vacuum is equal to the speed of light.
In equation form: c =

v = f x
Speed (v ): of the wave in meter/second (m/s)
Frequency (f) :number of waves that pass a cycle per second in Hertz (Hz)
Wavelength(m): is the distance from crest to crest or trough to trough.

Sample problem:
An X -ray photograph is taken with em waves that have a wavelength of 4 x 10-8 m and a speed of 3 x 108 m/s, Calculate the frequency.

1. The frequency of an EM wave is 400,000 Hz, and the wavelength of the wave is 750 m. What is the speed of the wave?

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2. Find the wavelength of an EM wave traveling in a vacuum with a frequency of 5 Hz.

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3. What is the wavelength of electromagnetic radiation travelling at a speed of light with a frequency of 5 x 1012 Hz?

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4. Find the frequency of an EM wave with wavelength 2.5 m.

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Directions: Fill in the wavelength or frequency to complete the table.