Parts of a Wave
This is the highest point of a transverse wave.
What is the crest?
What type of electromagnetic wave has the longest wavelength?
Radio waves
How are X-rays used in medicine?
They are used to take images of the inside of the body
Describe the characteristics of amplitude and frequency in transverse waves on the electromagnetic spectrum.
As the waves progress along the electromagnetic spectrum, the frequency gets higher, and the wavelengths get shorter. The amplitude changes as the signal gets stronger or weaker.
What is the relationship between amplitude and sound?
Greater amplitude means louder sound
How is the amplitude of a wave defined?
The distance from the rest position to the crest or trough.
Which part of the electromagnetic spectrum is visible to the human eye?
Visible light
What technology uses electromagnetic waves to transmit data over long distances without wires?
Wireless technology (radio waves)
Which of the following best explains how energy is transferred in sound and electromagnetic waves?
A disturbance that transfers energy
Name one everyday device that uses infrared waves
a remote control, thermal vision
What is the distance between two consecutive troughs or crests called?
The wavelength
How does ultraviolet light differ from infrared light?
UV light has higher frequency and energy than infrared light
How is fiber optics used in communication?
It uses light to transmit data through glass fibers for high speed internet
How do frequency and wavelength compare on the electromagnetic spectrum?
Wavelength decreases as frequency (energy) increases.
How does radiation therapy use electromagnetic waves?
It targets and destroys cancer cells using high-energy waves
How does frequency relate to the energy of a wave?
The higher the frequency, the higher the energy
What are gamma waves commonly used for in doctor's offices?
Radiation therapy for cancer
In what way do ultraviolet waves aid in sterilization?
They can kill bacteria and viruses due to their high frequency
What type of radiation would be characterized with the highest frequency and shortest wavelength?
Gamma waves
Explain why microwaves are useful for heating food.
They have a low frequency, so they are not harmful to humans, and heat up food very quickly
What happens to the frequency of the wave if the wavelength is getting longer?
The frequency will decrease
What is the order of the electromagnetic spectrum from longest wavelength to shortest?
radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays
What is one application of electromagnetic waves in astronomical observations?
They help to study distant stars and galaxies through different wavelength
Radios, laptops, and radar are examples of devices that function by using electromagnetic waves. What property of electromagnetic waves make them useful for radios, laptops, and radar signals?
They can travel long distances
What is the connection between frequency and the color of visible light?
Different frequencies correspond to different colors