Light Energy Flashcards
What is light?
Light is a form of energy
How do we create light?
We can create light by converting other types of energy into light energy
Can light energy be converted into other types of energy?
Yes and example would be when you concentrate light rays to one point with a lens to start a fire, you are converting light energy into heat energy
What is the definition of energy?
It is “the ability to make something move”
What is “wave particle duality” when talking about light?
It means that light has properties similar to both those of waves and of particles
Why does light have some of the same properties of particles?
Because it travels from one place to another in a straight line and it doesn’t bend around corners, needs to be bounced
What is the main model people use to describe light?
The wave model
Why do people use the “wave model”?
Because the wave model of light shows us that light travels through empty spaces in waves (doesn’t need a medium) and transfers energy from one place to another (ex: from the sun to the earth)
What has a trough and a crest?
A wave of light
What is a trough
The trough is the lowest part of the wave
What is a crest?
The crest is the highest part of the wave
How is the wavelength of a wave measured?
The wavelength of a wave is measured by the distance between each trough, or the distance between each crest
How is the apmlitude of a wave measured?
The amplitude of a wave is measured by the distance between the crest (or trough) and the midline (the midline is an imaginary line that goes through the middle of a wave)
What is frequency?
Frequency is how many waves pass a certain point in a given amount of time
True or false? The longer the wavelength, the higher the frequency and energy.
FALSE - the shorter the wavelength, the higher the frequency and energy.
