How Does Light Allow Me to See?
Why is it impossible to see the coat room from where we are sitting?
What is you need a direct, unblocked path between an object and your eye in order to see an object?
Why does blacktop on the road feel hotter in the summer than concrete on the sidewalk does?
The road is a darker color than the sidewalk so it absorbs more of the sunlight than the sidewalk. The more light it absorbs the hotter it will get.
We shine red, blue, and green light on one spot, what color light do we see?
White light.
Which color of light has the longest wavelength?
Red Light
What experiment did we use to learn about the conditions for seeing?
Light Box
Why do shadows form?
They form because there is an object in between the path of light and a surface.
How can you see a tree through a window?
Some light from the tree is scattered and transmitted through the window where it will reach our eyes.
Why is the combination of multiple colors of light brighter than an individual color of light?
The combination of two colors of light is brighter because it is made of more than one light source, and the more light that hits our eyes the brighter it is.
Which color of light has the shortest wavelength?
Blue Light
How did we learn about reflection and scattering?
Flashlight and mirror activity.
What part of the eye allows light to enter?
The pupil
What happens to rays of light when they hit glass?
A room is illuminated by green light (and ONLY green light!) what color will a red ball appear to be?
It will appear to be black because it will absorb all of the green light and scatter none, so no light will reach our eyes from the object.
Yes there are forms of light that we can not see. Two of these forms of light are Infrared light and Ultraviolet light.
How did we learn about white light?
The color filters experiment?
What does the retina do?
Detects light and sends a signal to the optic nerve which then sends a signal to the brain.
What are the three types of objects that light can interact with? (Think about how light hits these objects!)
White light hits a blue filter, what happens to all of the colors of light?
Blue light is transmitted, other colors of light are absorbed, some blue light is reflected/scattered.
How are sunscreen and the colored filters from class similar?
Sunscreen absorbs all UV light, the filters absorb all of the light except for the color which they allowed to be transmitted.
How did we separate the colors of white light to see all of them?
We used C-Spectra sheets.
What are the four conditions needed to see/detect an object?
1. An Object 2. An eye/light sensor 3. Light/a source of light 4. An unblocked path between the eye and the object
Which of these is opaque: air, sunglasses, wooden desk?
Wooden Desk.
How can white light be separated into the colored lights of which it is composed? (2 examples of this)
Filters can separate an individual color of light from white light.
C-Spectra/Prisms/Water can separate and bend white light to show all of the colors of white light (ROYGBIV).
Which types of non-visible light from yesterday are used in medical treatments?
Gamma Rays and X Rays
We filled beakers with dark colored water and clear water to show that darker colors absorb more light and heat than lighter colors.