Light and Color
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36 Terms
What part of the wave is “A?”
Crest
What part of the wave is “B?”
Trough
What part of the wave is “C?”
Amplitude
What part of the wave is “D?”
Wavelength
Light is a form of ______________ that travels at 300,000 kilometers per second.
Energy
Light is mostly produced by _________, which are the smallest building blocks of everything in the universe.
Atoms
Two ways to add energy to an atom are through h______ or e______.
Heat or electricity
Sound waves always travel in ____________ waves.
Longitudinal
Light waves always travel in ____________ waves.
Transverse
What do all sound waves need to make sound?
Vibrations
Name one place where humans can NOT hear sound.
Space
If sound waves are mechanical, how can we describe light waves?
Hint: Light waves use electricity + magnetism.
Electromagnetic
What type of wave is shown in the diagram?
Longitudinal
What type of wave is shown in the diagram?
Transverse
What part(s) of the electromagnetic spectrum are humans able to see?
(radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays)
Visible Light / Visible Spectrum / Color
What part of the electromagnetic spectrum has the lowest frequency waves?
(radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays)
Radio
What part of the electromagnetic spectrum has the highest frequency waves?
(radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, gamma rays)
Gamma
What building block of matter produces light?
Atom
Why is light able to travel through millions of miles of space?
It does not need vibrations to travel.
What do we call ALL of the light waves that exist, even those humans can't see? Hint: What might we title the diagram?
Electromagnetic Spectrum
Which wave has a lower frequency?
B
How fast does light travel? (in kilometers per second)
300,000 kilometers per second
If sound waves are mechanical, how can we describe light waves?
Electromagnetic
What kind of waves are sound?
Longitudinal
What kind of waves are light?
Can humans see infrared waves? Yes / No
No
Can humans see ultraviolet waves? Yes / No
No
According to the chart, which color has the longest wavelength and lowest frequency?
Red
According to the chart, which color has the shortest wavelength and highest frequency?
Violet
The number of times per second that a light wave repeats itself. It is measured in hertz (Hz).
Frequency
Which wave has a lower frequency?
B
Which wave has a higher frequency?
A
How is frequency measured?
Hertz
A substance that colors materials by reflecting and absorbing light of of certain wavelengths.
Pigment
What is a dark green pigment found in plants?
Chlorophyll
What color has the longest wavelength?
Red