How does light help me see?
How does light interact with an object?
How do I see Color?
Is there light I cannot see?
Miscellaneous
100

What are the four components we need in order to be able to see?

1) Eye 

2) Object

3) Light 

4) Direct Path

100


What happens when light hits a piece of computer paper? 



It is SCATTERED in many directions.  Some light may TRANSMIT.

100

What color of light is a mixture of all the colors of the visible spectrum?

White light

100

Light with wavelengths our eyes are able to detect is called __________________ light.

Visible

100

Shadows form where the path of light was _____________ by an object.

Blocked

200

True or False? We don't see an object, we see LIGHT bouncing off of an object.

True

200

Who feels warmer on a sunny day: a person wearing a white or black tshirt? Why?

Black- the light is absorbed and changed into heat or thermal energy.

200

What color of light do we see when all light is absorbed and none is reflected?


Black 



200

Different colors of light appear to have different colors because they have  different __________________.

Wavelengths

200

True or False: Clear shadows form when there are many sources of light.

False.  When there are many sources of light the shadow is fuzzy and does not have clear edges.

300

How do pupils adjust to help our sense of sight?

They enlarge in areas with less light and get smaller when there is more light.

300

Will the person see the triangle? Why or why not?

No- the path of light is being blocked by the rectangle.

300

White light shines on Peter's shirt and it looks blue.  Why?

Blue light was reflected or scattered, all other colors were absorbed.

300

A type of light we cannot see that is longer than red light in wavelength and can be used to learn more about the galaxy based on the heat objects in the solar system give off is called ____________________________ light.

Infrared

300

True or False: 

Light must enter the eye in order to be able to see. 

True

400

Explain what is wrong with this sentence: 

Nocturnal animals are awake at night so they can see when it is completely dark. 

You need some light to see an object, so if it was completely dark even nocturnal animals wouldn't be able to see.

400

When light is ____________ it passes through a surface.

Transmitted

400

Green light( using a filter) shines on a green plant in a red pot.  What color will the plant appear?


Green- the green light will be reflected, none will be absorbed. 



400

A type of light we cannot see that is shorter than violet light in wavelength and can damage our skin if we don’t wear sunscreen is called ____________________________ light.

Ultraviolet (UV) Light

400

True or False: Light will stop traveling even if it has not yet reached an object.

False. Light only stops traveling when it is blocked by an object.

500

Light travels in a ________________ line.

Straight

500

Polishing objects allows them to _____________ more light.

Reflect


500

Green light( using a filter) shines on a green plant in a red pot.  What color will the red pot appear?

Black- the green light will be absorbed and nothing will be reflected.

500

What is one type of light with a wavelength outside of the visible spectrum that we can see? Explain at least one way this type of light can be useful to us.

OPTIONS: 

Radio- Transmit tv signals and important for communication 

Microwaves- cell phones and radar 

Infrared- detect new starts based on the heat they give off 

Ultraviolet -create sterile environments and help jaundice in babies

X-ray- used in medical practices to see inside the body 

gamma- can be used to help fight cancer and study black holes

500

What part of the eye contains cones and rods to sense color?

Retina