Test review for Chapter 19 and 20- IPC

what type of waves are sound waves?

mechanical

the change in pitch due to a moving wave source is called what?

the doppler effect

If vibration is at right angles to the direction that the wave is said to be a what?

transverse wave

a ________ object emits light waves

luminous

when waves from diffrent sources cross paths, the resulting effect is called what?

interference

_________ is a unit of intencity

Candela

If the vibration occors in in the same direction taht the wave is trveling, the wave is called what?

a Longitudinal wave

It is important to remeber that radio waves are not what?

sound waves

Light is an electromagnetic wave and ________ is a mechaniscal wave.

sound

The _________ is the height of the wave

amplitude

waves carry ______ from one place to another.

energy

What unit do we use to measure the loudness of sound?

decibals

What do sound waves need in order to travel?

a Medium

What are the colors of the visible sectrum from highest to lowest frquency?

Violet, Indigo, blue, geen, yellow, orange, and red

Scientists measure frequency in units called what?

hertz

How do you distinguish an illuminated object from a luminous object?

An illumante object reflects light; a luminous object is a source of light

Do gamma rays have lower or higher frequency than microwaves?

HIGHER!

Which waves have shorter wavelengths; radio waves or X-rays?

X-rays

Sunlight is a combination of _________ , _________ and ___________ radiation.

Visible, Ultra-violet and infrared

microwaves are also used in what?

radar

the distance that a wave rises or falls from its normal rest position is called the _____________ of the wave.

amplitude

what is the formula for calculating speed of a wave?

V=F Wavelength

Define electromagnetic waves.

Energy in wave from that is capable of trveling through a vacuum: radio waves, microwaves, ect.

lowest point in a wave

trough