Vocabulary
Energy that we can see.
Light
A brick is... (opaque, transparent, translucent)
Opaque - light cannot pass through it
What do we use today to talk to people who live far away?
A cell phone
What do we call it when light bounces off of something? (think of a mirror!)
Reflects
Dark shape behind something that is blocking light.
Shadow
Glass is... (opaque, transparent, translucent)
Transparent - light ca pass through it.
What is a "dot?"
One short burst of light for Morse code
What is the best object for reflecting light?
A mirror
Anything used to make/build things.
Materials
Thin cloth is... (opaque, transparent, translucent)
Translucent - some light can come through it
What is a "dash?"
One long burst of light for Morse code
What would you do if you wanted to make a room brighter? (turn off the lights, turn on some of the lights, turn on all of the lights)
Turn on all of the lights.
Some light can pass through (cloudy).
Translucent
Water is... (opaque, transparent, translucent)
Transparent - light can pass through it
What is Morse code?
A way of communicating / "talking" to people from far away
What does opaque mean?
Light cannot go through an object.
Light can pass through it.
Transparent
Paper is... (opaque, transparent, translucent)
Translucent - some light can pass through it.
Why is Morse code important?
We can "talk" to people from a long way away.
What path does light travel if there is no object in front of it? (think of what happened before the mirror!)
In a straight line