Wave Behaviors
What wave behavior makes light bounce off a mirror?
Reflection
Which wave type does NOT need a medium to travel: light or sound?
Light
What does "dense" mean for a material?
How tightly packed the particles are
Which lens type is thicker in the middle: convex or concave?
Convex
What lens is used in a magnifying glass?
Convex lens
What do we call it when a wave bends as it enters water?
Refraction
Which wave travels faster: light waves or sound waves?
Light waves
Does sound travel faster in air or water?
Water
Which lens spreads light out: convex or concave?
Concave
What wave behavior explains why you can hear someone around a corner?
Diffraction
What is the wave behavior when sound is soaked up by a curtain?
Absorption
Which wave can travel through a vaccuum?
Light waves
A light wave moves from air into glass. What usually happens to its speed? Which wave behavior is this?
It slows down.
Explain the difference between converging and diverging when it comes to lenses.
Converging lenses bring light rays together, and diverging lens spread light rays apart.
Why do dark-colored cars get hotter in the sun?
Dark colors absorb more light energy, which is converted into heat.
Diffraction
Why can't sound travel through space?
There is no medium (no particles) in space.
Would sound travel faster in metal or foam? Why?
Metal, because it is denser.
What happens to an image when an objects moves closer to a convex lens?
The image gets larger.
Draw a simple sketch for a concave lens. Label the wave before and after and whether it is converging or diverging.
(See teacher)
When a wave enters a medium and does not leave, what is that called?
Absorption
In which type of material does sound usually travel the fastest: solids, liquids, or gases? Why?
Solids, because sound waves move by vibrating particles and, in solids, particles are much closer together, allowing vibrations to pass quickly from one particle to the next.
How does increasing the density of a medium affect the speed of sound differently than it affects the speed of light?
For sound, greater density increases speed. For light, greater density slows the wave down.
How does a concave lens affect light rays and the image formed?
It spreads light out and forms a smaller image.
Draw a simple sketch for a convex lens. Label the wave before and after and whether it is converging or diverging.
(See teacher)