A longitudinal wave that is caused by vibrations that travel through a material medium.

The two things that light acts like; the dual nature of light.

An object that is very good at reflecting light because of it's smooth, shiny surface.

It travels in a straight line through empty space.

This household item contains both a concave and a convex mirror. (And no, it's not a mirror.)

Decibels measure this aspect of sound.

Sunlight contains visible light as well as this type of non visible light.

A model of light used to describe reflection, refraction and other effects of light. (Not as a wave or particle.)

This object uses refraction and dispersion to separate different wavelengths of light. When white light goes in, a rainbow comes out.

The green leaves of a rose will appear this color when under only red light

A system that uses acoustic signals and echo returns to determine the location of objects or to communicate. This is used in the ocean in ships to determine ocean depth, and submarines to determine distance from various objects. Bats also use this. :)

Because of this, you can get sunburned on a cloudy day.

How flat mirrors form virtual images.

This is what happens when light passes from one medium to another. It also can make objects appear to be in different positions than they actually are. (Why does a pencil look broken when half of it is in water?)

These cables are made of several glass or plastic fibers bundled together. Light is reflected inside them.

A measure of how high or low a sound is perceived to be depending on the frequency of the sound wave.

These types of light are used in medicine.

These objects use mirrors to reflect and focus light.

This is an object that uses lenses to magnify an image.

What does SONAR stand for?

A phenomenon that occurs when two objects naturally vibrate at the same frequency. Instruments also use this to amplify sound.

A system that uses reflected radio waves to determine the velocity and location of objects. This is used in the air, like in Air Traffic Control towers or airplanes.

Objects have this because they reflect certain wavelengths of light. When this certain wavelength of light is reflected, we see this.

A transparent object that refracts light waves so that they converge (come together) or diverge (move apart) to create an image.

Rainbows are caused by these things happening inside water droplets.