Wave basics
how many types of wavelengths are there?
What is 7
This type of wave has the longest wavelength.
What are radio waves?
What is one of the uses for microwaves?
Heating food, radio, telesc to study planets and wifi and phones.
Which wave type has the lowest energy?
Radio waves
What star produces most electromagnetic waves that reach Earth?
The sun
This is the number of waves that pass a point per second.
What is frequency?
These waves are used in microwave ovens.
What are microwaves?
A wave travels through matter called the “”?
What is medium
Which wave has more energy: visible light or infrared?
: Visible Light
Which waves are used in airport security scanners?
X rays
All electromagnetic waves travel at this speed in a vacuum.
The speed of light
This is the only part of the spectrum humans can see.
What is visible light?
True or false not all waves need a medium
True not all waves need a medium
What wave comes after ultraviolet in the spectrum toward higher energy?
X-Rays
What invisible wave helps us feel warmth from sunlight?
Infrared waves
True or false Both X rays and gamma rays have a higher frequency than UV rays
True they both have higher frequencies than UV rays
These waves can cause sunburn.
What is ultraviolet radiation?
What is electromagnetic radiation?
A form of energy
What determines the energy of an electromagnetic wave?
Its frequency
What type of electromagnetic wave helps police measure how fast cars are moving with radar guns?
Microwaves
As wavelength increases, frequency does this.
What is decreases?
These waves have the shortest wavelength and highest energy.
What are gamma rays?
What was gamma rays created from
What is nuclear reactions
Which wave is commonly produced by radioactive materials?
Gamma rays
What electromagnetic waves travel at the speed of light?
All of them