Practice identifying the types of electromagnetic waves, comparing their properties, and connecting them to real-world uses.
Read each problem carefully. Answer in complete sentences and show your thinking when needed.
Wavelength, frequency, and uses of electromagnetic waves
Physics - Grade 6-8
- 1
What is the electromagnetic spectrum?
- 2
List the seven main types of electromagnetic waves in order from longest wavelength to shortest wavelength.
- 3
How are wavelength and frequency related in the electromagnetic spectrum?
- 4
Which part of the electromagnetic spectrum can the human eye detect?
- 5
A television remote control often uses infrared waves. What is one reason infrared is useful for this job?
- 6
Radio waves and gamma rays are both electromagnetic waves. Describe one similarity and one difference between them.
- 7
Why are X-rays useful in medicine?
- 8
Ultraviolet waves from the Sun can be harmful. What is one way people protect themselves from too much ultraviolet exposure?
- 9
Compare visible light and microwaves. Which one has the shorter wavelength, and which one has the higher frequency?
- 10
A student says that all electromagnetic waves need matter to travel through. Is the student correct? Explain.
- 11
Give one common use for each of these types of waves: microwaves, ultraviolet, and radio waves.
- 12
Why do gamma rays have more energy than radio waves?