Light
What is light?
- Light does not have volume or mass so it does not matter.
-Light is part of the electromagnetic spectrum.
-Light is energy that looks like it travels in a straight line but it actually travels in waves.
How do we see?
-Retina is connected to your nerves to the brain.
-Iris is the colored part of your eye.
- Light, eyes, brain, and an object.
Diseases that Affects Eyes
- Diabetes affects the eyes to create a fogginess that is called glaucoma. It is a white film around the eye.
Farsightedness is when things that are far are blurry so you need convex lenses. Nearsightedness is you can’t
-Blurry vision is called astigmatism.
Optical Illusions
-Mach Band illusion is when two colors together make a darker color. Used in x-rays.
-Eye and hand illusion works because the brain wants to focus on one object.
-It works by having the brain fill in missing spaces.
Polarized Sunglasses
- If hold glasses together and one at 90 degrees the image goes dark.
-Sunglasses make the unpolarized light to polarized.
-Illegal for pilots to wear while flying because it darkens the polarized monitors.
What can light do?
- Light can scatter off of paper because paper has tiny bumps.
-Light can reflect which means bounce.
-Light can bend (refraction), it is trying to go through an object.
Concave and Convex Lenses
-Convex lenses are more clear and concave are blurry.
-Concave and convex lenses are used for mirrors, telescopes, and microscopes.
-Concave lenses are bent inward and convex are outward.