Light
How does light travel?
In waves.
What part of the eye shows your eye color?
The Iris
What type of objects are you able to see completely through?
Transparent
No, the light waves are on a spectrum and act very differently than paint.
What is white light? Is it the color white?
No, white light is the combination of red, green, and blue light.
What are the 3 colors the cones in our eyes are most sensitive to?
Red, Green, and Blue
Why are we able to see our reflection in a mirror but not in a piece of wood?
The mirror is reflective, the light bounces back into our eyes. Wood is not reflective, it absorbs the light instead.
What part of the spectrum can humans see?
Visible light
What is "black light"?
Explain what part of the eye helps you see in the dark. What does it do to help you?
The pupil dilates to let in more light in the dark and contracts when you are in bright light.
Only the red light waves are able to pass through the filter and reach our eyes.
Red and Green lights are both shined onto a white screen, what color will we see:
Black
White
Red
Green
Yellow
Yellow! The two will mix to make another color.
If there are 2 plants each under a different light, one under a red light and one under a green light, which one will grow better?
The one under the red light, the leaves reflect the green light so they are able to ABSORB more with the red light.
What part of the eye has the Rods and Cones?
What are the 4 things needed to be able to see? (100 points per correct answer)
1. Light source
2. Eyes
3. Object
4. Clear Path
In the summer the road is hotter than the grass. Explain why the road would be hotter than the grass.
The road is absorbing all of the heat and then it is just sitting there with very little being bounced off.
The grass only green light is being absorbed the rest is bouncing away and absorbed into different parts of the ground - soil for example.
A shadow is created when an opaque or translucent object blocks a light source.
Explain how we are able to see in order. Give a step by step example - 100 points for each correct statement.
1. light waves go out from the source and hit objects.
2. part of that light is absorbed by the object, the rest bounces towards our eyes.
3. the light waves enter our eyes, travel to the retina, then to the optic nerve to the brain.
4. the brain then translates the waves into a picture to understand what we see.
John and Justin are playing hide and seek at home. From the back of a room John says he can see Justin around the corner in the next room. Is John cheating, or can he see around the corner? What is the explanation for your answer?
There could be a mirror that he could see around
What is the range called that visible light is part of? Hint: radio waves and radiation waves are also part of this.