Light
a form of energy emitted by the sun
Transparent
Matter that allows all light to pass through
Translucent
Matter that allows some light to pass through
Opaque
Matter than does not allow light to pass through
Reflection
How light bounces off the surface of an object
Refraction
Light waves refract because the speed of light changes as it enters a new medium
Diffraction
Light waves bend around a barrier
Electromagnetic Waves
Does not require a medium to travel; travels through vacuum or empty space
Light waves
Form of mechanical energy as a longitudinal / electromagnetic wave that travels through a vacuum;
Absorption
occurs when light waves transfer energy to particles of matter & converts to heat; does not travel through
Reflected color
The color we see
Transmission
Occurs when light waves pass through an object without interacting
Prism
Refracts white light to cause a rainbow
Short wavelength =
High frequency; high energy
Low frequency=
long wavelength; low energy
Shadow
Happens when light hits an opaque object
Heat
Light converts energy to...
Visible light
All the light we can see on the electromagnetic spectrum; Used by humans to observe the world
Sunlight
White light
Light wavelengths determine a light's...
Energy
Gamma Rays
used to kill bacteria, and sterilize medical equipment; shortest wavelengths; highest frequency; highest energy
X-Rays
used to image bone structures
Ultraviolet Rays
used to kill bacteria, and sterilize medical equipment
Infrared
night vision, heat sensors, laser metal cutting
Microwaves
microwaves ovens; radar
Radio Waves
radio, television broadcast; longest wavelengths; lowest frequency; lowest energy
These waves are classified by their frequency
EM Waves
Anything that gives off heat radiates...
Infrared Waves