Light and Shadows Flashcard

Front

How are shadows made?

Back

An object blocks the path of the light which creates an area where no light reaches.

Front

List the conditions that need to be met in order for people to see an object.

Back

An eye, an object to see, a light source, an unblocked path between the object and the eye.

Front

What must happen to the light for our eyes to see a book in the sunlight?

Back

The sunlight bounces off the book and enters the eye.

Front

Can John see Justin around the corner while playing hide and seek?

Back

John is cheating. Since John is around the corner there is not a direct path between the two so John cannot see Justin.

Front

Why does a shadow appear black?

Back

A shadow is the area behind an object that is facing a light source. It is not lit up because light is blocked from getting there and cannot scatter any light. When no light is present we see black.

Front

How does light from a flashlight behave so Kate can see her phone?

Back

Model 1 best represents how light from the flashlight reaches her phone and bounces off the phone in all directions. Some of the light reaches her eyes.

Front

Use the light model to predict what a light detector would detect when pointing toward the shadowed area?

Back

The light detector would not detect any light. No light reaches the shadowed area; therefore, no light is bounced from that area to the light detector.