Light Waves
Light waves must have a medium to travel through in order for us to see.
False
The lowest part of the wave is _______
The Trough
EM waves ________________ travel through space.
Can
What type of energy does a sound wave have?
Mechanical.
Areas of increased pressure on a sound wave are known as a __________
Compression.
Radio waves are visible.
False
The highest point on a wave is _____
The Crest
_____________________ light is the only type of EM wave detected by the human eye.
Visible
Sound is made via. ______
Vibrations.
The distance from the beginning of one compression to the beginning of the next compression is called a _____
Waveleghth.
The higher the _______________ the brighter the light.
Amplitude
Light is a form of _____
Energy
_____ have the longest wavelengths and lowest frequencies of all electromagnetic waves.
Radio Waves
True or False: Sound needs a medium.
TRUE!
Spread-out areas or areas of decreased pressure on a sound wave are known as a ______
The light and heat energy that comes from the sun, comes to Earth in the form of _________________.
Radiation
Cell phones use_____________waves.
Mircro
The shortest wavelength in visible light is______
Violet
Sound waves are also known as _________ waves.
Both longitudinal and or compression
The number of wavelengths that pass a fixed point each second is known as ____
Frequency.
Name one of the three wave types we learned in this unit.
transverse
circular
The EM spectrum increases from left to right in________________.
Frequency
_______ carry the most amount of energy.
Gamma Rays.
True or False: Sound waves are faster than light.
FALSE!
The unit for measuring frequency is the ____
Hertz.