Light
Light travels in this kind of path.
What is straight?
True or False: A shadow is formed in front of the object.
False. A shadow is formed behind the object.
Bill and Joe are playing hide and seek at home. From the back of the room Bill says he can see Joe around the corner in the next room. Is Bill cheating? Explain.
Yes, Bill is cheating. Light travels in straight lines. There must be a direct line of sight from Bill to Joe in order for Bill to see him. Since Joe is around the corner, there is no direct path between the two, so Bill cannot see Joe.
When an object looks brighter, the more that ____ is reaching your eye.
What is light?
True or False: Models can change when people learn new information.
True
The power is out in your house, and you want to call a friend to see if the power is out in her house too! First you must find the telephone in the dark using a flashlight. Explain what must happen for you to see the telephone.
The light shines at the phone, then the reflection bounces off the phone into my eyes allowing me to see.
These four conditions are needed in order to see an object.
What is...
1. Light
2. Eye
3. Object
4. Straight, unblocked line of sight
True or False: There is one correct way to model a phenomenom
False: It can be modeled in multiple ways.
Light is getting blocked by an object and shining around the object on to a surface behind it creating this.
What is a shadow?
Light is measured using these units.
True or False: All models have both strengths and weaknesses
True
One can change size and is usually a different color, while the other stays the same size and usually has more color and details.
What is the difference between an object and a shadow?