Light Waves

Electromagnetic Waves: Light Waves

By Dillion Cantrell

Radiation, Radio, X-rays, microwaves, lasers, energy from the sun, visible light.

Examples:

• These waves do not need a medium to travel

• They have similar characteristics to transverse waves, they have a crest, trough, wavelength, and amplitude.

EM Waves:

Electromagnetic Waves

Multiple Choice

If your new bike is painted so that it looks red, what color of light is reflected by the paint?

• blue

• indigo

• red

• violet

Multiple Choice

In order for you to see an object, which of these must happen?

• Light reflected from the object's surface must enter your eyes.

• The object must have a shadow, for your brain to interpret what it is.

• Light must be absorbed by the object and then refracted back to your eyes.

• Light travels from the object, back to the light source, and then to your eyes.

Multiple Choice

Although you can see the pencil, it appears broken in the glass of water. This is because

• electromagnetic waves cannot travel through solids.

• electromagnetic waves travel at different speeds through different media.

• electromagnetic waves compress more when they travel through denser media.

• electromagnetic waves get closer together when they go through dense media like glass.

Open Ended

Explain the difference between diffraction and refraction.

Multiple Choice

What happens if an opaque object is placed in the path of light?

• Light bends when it hits the object.

• Light does not pass through the object.

• Light completely reverses its direction.

• 
  Light pierces the object and continues to travel.

Multiple Choice

A student shines a light on a piece of transparent glass. Which of the following diagrams accurately shows the path of the light?