Electromagnetic Waves
A wave that is created by alternating magnetic and electric fields is called?
Electromagnetic
How many regions are on the electromagnetic spectrum
7
What does it mean if something is transparent?
what is white light?
light that contains all the colors but appears colorless
What does UV light do to humans?
Some exposure is okay, can cause skin damage.
Electromagnetic waves travel as what kind of waves
Transverse
what is the longest wavelength on the EM spectrum
radiowaves
Which light interaction is responsible for making the sky blue
Refraction
splits in to different colors based on wavelength
Infrared Waves on the electromagnetic spectrum give off what
heat
True or false, electromagnetic waves can travel without a medium
what is the shortest wave on the EMS
gamma rays
what does it mean if light is transmitted? reflected? absorbed?
light passes through the medium. light bounces off the medium. light enters the medium.
What are the three primary colors of light
Red, green, blue
Blue light and green light make
What is the speed of light?
300,000,000 m/s
energy
What light behavior is occurring when a shirt appears black?
Absorption
What are the three secondary colors?
Magenta, yellow, cyan
white light
A particle with no mass and is considered a little packet of energy is called what
Photon
What is the order of the electromagnetic spectrum going from highest frequency to lowest
gamma ray, x ray, UV, visible light, infrared, microwave, radio wave
The rate at which a wave’s energy flows through a given unit of area is known as
Intensity
what is the term for when mixing colors begins with white and ends with black?
color subtraction
Which photo receptors in the eye perceive color (and what colors) and what ones help in dim light?
Cones - Red, Green Blue
Rods