module 6 properties of waves

Question 1

oscillation

Answer 1

a repetitive motion that usually occurs about a center point or equilibrium.

Question 2

equilibrium

Answer 2

a center point in which an oscillating object eventually returns after a disturbance is gone

Question 3

mechanical waves

Answer 3

these can travel only through matter. they require a medium to transport the energy of the wave.
ex. ocean and soundwaves.

Question 4

electromagnetic waves

Answer 4

do not require a matter to travel trough
ex. light
they have a transverse wave motion

Question 5

wave speed equation

Answer 5

waves speed=wave length X frequency

Question 6

parts of the wave

Answer 6

crest- top
through- bottom
wave length- distance between crests

Question 7

pulse wave

Answer 7

one crest travels one wave

Question 8

continuous wave

Answer 8

several waves continuous

Question 9

transverse waves

Answer 9

the oscillation is perpendicular to the direction the wave is traveling

Question 10

longitudinal waves

Answer 10

the oscillation is parallel to the direction the wave is traveling (slinky)
ex. sound waves

Question 11

amplitude

Answer 11

the vertical distance from the equilibrium to the crest

Question 12

frequency of the wave

Answer 12

tells us how many oscillations the wave makes in a given amount of time

light: the lowest visible frequency is red.
- highest visible frequency is violet

Question 13

SI unit for oscillations pers second

Answer 13

hertz (Hz)

Question 14

period

Answer 14

the time for one full oscillation of a particle in a medium

Question 15

constructive interference

Answer 15

when the waves build on each other and form one big wave

Question 16

destructive iterference

Answer 16

when the waves cancel each other out

Question 17

radiowaves

Answer 17

have the longest wavelengths of all EM radiation. Radio wavelengths range from a few meters to millions of meters or more.

Question 18

microwaves

Answer 18

have wavelengths that are shorter than those of radio waves. The wavelengths range from a few decimeters to a fraction of a centimeter.

Question 19

infrared

Answer 19

Consequently, infrared frequencies are higher than those of microwaves, but lower than those of visible light. Although we cannot see this radiation, we can feel it through our skin as heat.

Question 20

ultraviolet

Answer 20

UV wavelengths are comparable to the size of molecules. The frequencies are about 10 to 100 times greater than those of visible light. The greatest source of UV radiation on the earth is the sun.

Question 21

x-rays

Answer 21

ave wavelengths that are shorter than UV rays but longer than gamma rays. X-rays therefore have higher frequencies and higher energies than ultraviolet radiation.

Question 22

gamma rays

Answer 22

are produced in nuclear reactions and explosions of giant stars. Gamma rays have the shortest wavelengths and highest frequencies and energies of all EM radiation.

Question 23

visible light

Answer 23

a very small portion of the EM spectrum. the most abundant radiation from the sun is in the visible part of spectrum