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Electromagnetic Waves

Study Slideshow

TRUE or FALSE: A wave is an energy created by vibrations that propagate in all direction.

TRUE

5

TRUE or FALSE: Mechanical waves like earthquake waves can travel even without a medium.

FALSE

5

TRUE or FALSE: All electromagnetic waves travel at the speed of light.

TRUE

5

What do you call the part of a sinusoidal wave line which refers to the highest point of a wave?

Crest

10

What do you call the part of a sinusoidal wave line which refers to distance from one crest to the next crest or one trough to the next trough?

Wavelength

10

How fast do EM waves travel in an empty space or vacuum?

3.0 x 10⁸ m/s

10

What property of EM wave refers to number of waves that pass a fixed point in a given amount of time?

Frequency

10

What property of EM wave refers to capacity of the wave to do work?

Energy

10

Which is the only EM wave that is detectable by the human eye?

visible light

10

If the frequency of EM wave increases, what will happen to its wavelength?

decrease

10

What is the relationship between frequency and energy of EM waves?

directly proportional

10

What kind of waves are used in the medical field to kill cancer cells or tumors?

gamma

10

What kind of EM wave is often used in killing bacteria or sterilization of water and medical equipments?

UV or ultraviolet

10

Which type of EM wave is often used in radio and TV broadcasting?

radio waves

10

EM wave often used in high speed cooking.

microwaves

10