Question 1

Which type of electromagnetic waves would the best to use in an object designed to cook food?

Accepted Answer

microwaves

Answer

visible waves

Answer

infrared waves

Answer

gamma waves

Question 2

Why does the leaf of a plant look green?

Accepted Answer

Because it reflects green light

Answer

Because it absorbs green light

Answer

Because it absorbs only yellow and blue light

Answer

Because it reflects a mixture of yellow and bluelight

Question 3

Why does white light separate into different colors?

Accepted Answer

refraction

Answer

dispersion

Answer

reflection

Answer

magnification

Question 4

What happens to a light wave as it moves from the air into water?

Accepted Answer

It slows down and its wavelength gets longer

Answer

It speeds up and its wavelength gets shorter.

Answer

It slows down and its wavelength gets shorter.

Answer

It speeds up and its wavelength gets longer

Question 5

A mechanical wave is caused by:

Accepted Answer

the transfer of energy through a medium

Answer

the transfer of an object

Answer

the transfer of energy through a vacuum (outerspace)

Answer

the motion of light through space

Question 6

Which is the lowest point of a transverse wave?

Accepted Answer

trough

Answer

period

Answer

amplitude

Answer

crest

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