Energy & Waves
This general term describes a repeating pattern that moves and carries energy from place to place.
Wave
The part of light energy that humans can see with their eyes
Visible light
The distance between one part of a wave and the same part on the next wave (crest to crest).
Wavelength
All the different types of light energy arranged by wavelength and energy are called the ______________.
Electromagnetic spectrum
The body part that receives light and sends information to the brain.
Eye
A wave made by vibrations that travels through matter (air, water, or solids) and can be heard. Name this type of wave.
Sound wave
Light that we cannot see but can feel as heat; often given off by warm objects.
Infrared
The height of a wave from the middle line to the crest.
Amplitude
Light we cannot see from the sun that can affect our skin.
Ultraviolet (UV)
Using the flow model Light Source → Object → Eye → Brain, what role does the object play in sight?
The object reflects or absorbs light.
This is a wave of energy that moves through the Earth during events like earthquakes.
Seismic wave
This occurs when an object takes in light instead of reflecting it.
Absorption
How many waves happen in one second is the?
Frequency
Which type of electromagnetic wave is used for heating food in a microwave and Is it visible or not visible?
Microwaves and not visible
Why does a red apple look red?
The apple reflects red light to our eyes and absorbs other colors.
The part of a wave where particles are close together in a longitudinal wave.
Compression
The range of different colors of visible light (red through violet).
Spectrum.
A wave where particles move up and down, perpendicular to the direction the wave travels.
Transverse
True or False: Visible light is the only part of the electromagnetic spectrum that carries energy.
False
In the flow model, which part sends messages to the brain so you can understand what you see?
Eye- sends information to the brain.
You can tell a wave repeats when this wave part stays the same distance between each crest.
Wavelength
Define “spectrum” referring to light in one sentence.
A spectrum is the range of different wavelengths or energies of light arranged from lowest to highest.
If you make a wave taller, which part increases and how does that affect the wave’s energy?
The amplitude increases and energy increases.
Give two examples of electromagnetic waves that are NOT visible light
All parts except visible light.
Describe the full flow of how light from the sun lets you see a tree.
Light from the sun (or a light source) hits the tree, then reflects to the eye, the eye sends signals to the brain, and the brain interprets those signals so you see the tree.