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Light Physics

learn about light

QuestionAnswer
what is the speed of light( in a vacuum)? 299,800,000 m/s
"Light is an electromagnetic wave" What does this statement mean ? This means it makes waves that are perpendicular to each other.
What is the name of type of light we see? Visible
The reason we can't see some colors. They are absorbed
What is refraction ? when light changes speed and is distorted
Ultraviolet light can cause cancer, and kill germs
What is wavelength (frequency) measured in ? Hertz
What is does reflection do ? light bounces off of surfaces at the same angle it meets the surface.
Amplitude the measure of a wave from the crest to the trough or baseline.
What controls brightness of a light wave? Amplitude
What controls the color of a light wave? frequency
The colors of the electromagnetic spectrum from strongest to weakest radio, microwaves, infrared, visible, ultraviolet, x-ray, gamma
crest the top of a wave
trough the bottom of a wave
baseline the middle part of a wave (no energy)
wavelength the distance from crest to crest
frequency the number of waves that occur in a second (hertz)
visible spectrum red, orange, yellow, green, blue, indigo, violet
radio waves used for communication like cellular and television
microwaves use to warm things up
infrared used in night vision and remote controls
photon a particle of light that behaves like energy and like matter.
x-ray used to see inside of things
gamma high energy wave that can instantly kill
Created by: mrrainesscience