Lights and Mirrors
All objects give off or produce light. What are two items that produce light and two items that reflect light?
Produce - Sun, lightbulb
Reflect - Moon, Mirror
What is the difference between transparent and translucent?
Transparent- light passes through with almost no disturbance.
Translucent - only some light passes through.
What is a prism?
Electromagnetism refers to forces that come from ________ and _________.
Electricity and magnetism
What color is a combination of all the rest?
White
Light usually travels in a ________ line. However, when it passes from one substance to another, it usually ________ direction.
Straight
Changes (Bends)
Explain refraction.
The bending of light rays as they pass from one substance to another.
Magenta, cyan, and yellow are called the _____________.
2 words
Primary pigments.
Each absorb one primary color of light and reflects the other two.
Uses radio waves that reflect off many objects. These waves can help weather forecasters detect rain and thick fog.
RADAR
True or False: A pencil bending in water is reflection.
False
If we could follow a point on a light wave as it ripples outward from it's source, we would trace a straight line. This beam of light is called a _______________.
Light ray
Is the eye a convex or concave lens? Why?
Convex because it curves outward
What are the primary colors of light?
red, green, blue
Sound waves are produced by
vibrations
__________, is the ways we use many products to control light.
Polarization
Mirrors that curve out on the shiny side are __________ mirrors.
convex
2 examples of a concave lense
Telescope and binoculars
Who passed a beam of white sunlight through a prism?
devices that produce think streams of light
lasers
True or false: Light rays that are reflected off flat polished surfaces scatter in all directions.
False
The angle between an incoming light ray and a surface equals the angle between the reflected light ray and the surface is called the ___________________.
Law of reflection
What is an example of refraction in everyday life?
Glasses, camera lens, formation of rainbows
2 words
ghostly vision
All the wavelengths of light (seen and unseen) are called the electromagnetic ____________.
spectrum
How are rainbows formed?
Drops bend rays of sunlight at different angles, causing the color to spread out.