How Light Travels
What does light do when it encounters a transparent material?
It passes through.
Define transmit.
Transmit - goes through.
What is a one-way mirror?
A special kind of mirror that lets people see through it from one side, but not from the other side.
Why can materials cause different amounts of light to transmit or reflect through it?
A material can have different structures, specifically at the microscale level.
How does light travel from a light source?
Light travels in a straight line.
Define reflect.
Reflect - bounces off.
How is a one-way mirror represented in a model?
See drawing on wall.
If you need help during the test, what should you do?
Look around the room and see if there's a poster to help you answer your question!
What kind of path does light follow?
A straight path.
Define light source.
Light source - something that makes light, like the sun, a lamp, or a flashlight. It's what helps us see things!
What did we learn about the one-way mirror in the light investigation?
It transmits about half the light and reflects half the light?
What is important to include in a model?
A key.
What happens to light when it hits a surface it cannot pass through?
It is reflected.
Define silvering.
Silvering - adding a thin layer of shiny metal, like silver, to the back of a mirror to make it reflect light. It's what makes mirrors magic!
What is in a one-way mirror?
It contains a thin coat of silver material (half-silvered), which means there are gaps in the silver layer. Some of the light reflects off the silver parts but some of the light transmits through the places without silver.
See wall poster.
How does one see an object?
For us to see an object, light must leave the light source, bounce off the object, and travel in a direct path to enter our eyes.
Define transparent.
Transparent - when you can see through something clearly, like a window or a piece of glass.
Draw a model of a one-way mirror and show how it interacts with the light.
See picture on wall.
Create a model to explain how light interacts with a mirror.
See wall poster.