Electromagnetic Wave Quiz

which is an example of a type of electromagnetic radiation?

• Apples

• beach waves

• X-rays

• light

what is wavelength?

• Distance from one crest of a wave to another

• the height of a wave

• the speed of a wave

What is a disadvantage to analog information transfer?

• it cannot be converted into a digital form

• it is impossible to capture the true richness of the original sound using analog waves

• huh?

• it can be easily disrupted by interference (snow on a TV, static on a radio)

Sounds in our everyday life like a person speaking, a bird singing, a baby's cry are which type of information transfer?

• analog

• digital

• none of the above

• all of the above

analog or digital: Computer

• digital

• analog

Analog or Digital: Iphone

• digital

• analog

Analog or Digital: cassette Players

• digital

• analog

is it an analog or digital: Typewriters

• digital

• analog

What causes light waves to refract?

• The speed of light changes from one medium to the next.

• The speed of light is reduced to zero.

• The speed of light remains constant.

• The light is repelled by some materials.

A girl casts a shadow on the ground. Which behavior of light explains this?

• light rays are absorbed by the ground where the girl is standing

• light rays travel in straight lines and are blocked by the girl's body to create the shadow

• light rays change speed when they hit the girl's body