Wave Basics
What is the distance from one wave crest to the next called?
Wavelength
Which type of EM wave has the longest wavelength?
Radio waves
Which color of visible light has the longest wavelength?
red
What is the formula for wave speed?
Frequency × Wavelength
What type of wave is used in radios?
radio waves
What type of wave needs a medium to travel through?
Mechanical wave
Which type has the shortest wavelength and highest energy?
Gamma rays
Which color of visible light has the highest frequency?
Violet
A sound wave has frequency 170 Hz and speed 340 m/s. What’s wavelength?
2.0 meters
What waves are used in microwave ovens?
Microwaves
What happens to a wave's energy when its amplitude increases?
It increases
Which wave type is used for cell phone communication?
Microwaves
What part of the EM spectrum do humans emit?
Infrared
What is the speed of light in a vacuum?
300,000 km/s or 300,000,000 m/s
What type of waves are used in X-ray imaging?
x-rays
What type of wave does not require a medium?
Electromagnetic wave
What three types of waves carry most of the Sun’s energy to Earth?
Infrared, Visible, UV
What happens to light as it moves from air into water?
It slows down
A wave has a frequency of 0.2 Hz and wavelength 5 m. What's speed?
1.0 m/s
Which wave type is used in remote controls?
infrared
What happens to energy when the frequency of a wave decreases?
It decreases
What part of the EM spectrum causes sunburns?
Ultraviolet
Which wave types are responsible for night vision?
Infrared waves
A light wave travels at 3 × 10⁸ m/s with a wavelength of 600 nm. Frequency?
5 × 10¹⁴ Hz
What EM wave is used to sterilize medical equipment?
Ultraviolet