Objective: SWBAT use models and textual evidence to explain why and when we see different colors.
Do Now:
Question 1
1.
Maya wonders which types of light could heat up a sheet of aluminum. The table below shows what happens when different types of light hit the aluminum.
Explain why will neither type of light cause the aluminum to change/heat up?
"I do not think that either type of light will cause the aluminum to change because ... "
(think: what is the ONLY type of light interaction that can cause an object to change?")
Exit Ticket Review:
Guided Notes:
Question 2
2.
Complete the guided notes below.
Question 3
3.
Question 4
4.
What evidence do you have that Laser 2 is different from the type of light emitted by Laser 3?
CFS:
Accurately identifies the differences in light sources
Accurately describes the relationship between wave properties and outcomes
"I know that laser 2 is a different type of wave from laser 3 because ...
(think: what do you notice about wavelength or amplitude?)
Practice:
Question 5
5.
Question 6
6.
Question 7
7.
Which wave will reflect when it hits the cylinder in the question above. Explain.
CFS:
Accurately identifies the differences in light sources
Accurately describes the relationship between wave properties and outcomes
"Wave (2A OR 2B OR 2C) is most likely to cause the cylinder to change.
This is because ... "
(Think: Do you want to pick a wave that has a different wavelength or amplitude?)
Exit Ticket:
In an experiment Aidan is trying to identify how different types of color interact with different colors of paint. Below shows the 4 different ways light can interact with a material. Aidan wants the paint to last as long as possible without changing, fading.
Question 8
8.
Describe what evidence you can find to determine which colors would be best to use and which would be worst?
CFS:
Accurately identifies the differences in light sources
Accurately describes the relationship between wave properties and outcomes
"I think the best color(s) that will not change over time are ...
I think that the color that would chagne and fade over time is/are ... "
(Think: what is the only type of light interaction that can cause an object to change?)
How does changing amplitude affect the way we will experience the three waves?
CFS:
Accurately identifies the differences in light sources
Accurately describes the relationship between wave properties and outcomes
Changing the amplitude changes the intensity of the wave (volume/brightness)
Changing the amplitude changes the type of the wave (pitch/color)
Changing the amplitude does not impact how we experiance waves
Why must the Lightsource 1 and 2 be different types of waves?
CFS:
Accurately identifies the differences in light sources
Accurately describes the relationship between wave properties and outcomes
Light source 1 must be different than Lightsource 2 because different sources must give off different types of light. For example, all computer screens give off different type of light because they are different computers
Light source 1 must be different than Lightsource 2 because they have different light interactions with the cylinder. The first one transmits, the second one reflects.
Light source 1 and Lightsource 2 are actually giving off the same type of light. This is because all light is the same. Light from the sun is the same as light from a light bulb.
How does changing amplitude AND wavelength affect the outcome of two waves?
CFS:
Accurately identifies the differences in light sources
Accurately describes the relationship between wave properties and outcomes
"Changing the amplitude of a wave changes the (type or intensity)
Changing the wavelength of a wave changes the (type or intensity)"
Changing the amplitude of a wave changes the intensity of the wave, wavelength changes the type of the wave
Changing the wavelength of a wave changes the intensity of the wave, amplitude changes the type of the wave
Both wavelenght and amplitude can change either the intensity or the type, it is uncertain.