Chapter #14 - Properties Of Waves

Question 1

What aperatus can halp us understand the properties of waves?

Answer 1

A ripple tank

Question 2

What is the equation for individual waves?

Answer 2

Velocity = frequency x wavelength

Question 3

What is the positions of molecules once it passes a wave along?

Answer 3

The molecules reman the same. A wave transfesr energy but not matter

Question 4

Draw a labled wave diagram

Answer 4

Question 5

What is the defenition of a crest/peak?

Answer 5

The highest point of a wave.

Question 6

What is the defenition of a trough?

Answer 6

The lowest point of a wave

Question 7

Whta is the defenition of a wavelength?

Answer 7

The distance between 2 adjecent crests/toughs of a wave.

Question 8

What is the defenition of frequency?

Answer 8

The number of waves made each second or waves passing a point per second.

Question 9

What is the defenition of a period?

Answer 9

The number of seconds it takes for each wave to pass a point.

Question 10

Equation for frequency?

Answer 10

Frequency = 1 / period

Question 11

Equation for period?

Answer 11

Period = 1 / frequency

Question 12

What is the speed of a wave equivalent to?

Answer 12

The speed at which the wave transfers energy from place to place.

Question 13

What does the speed of a wave depend on?

Answer 13

The amplitude (bigger amplitude, more energy = faster)

Question 14

A wave transfers energy without transfering ……

Answer 14

Matter

Question 15

What is defenition of a transverse wave?

Answer 15

A wave in which the vibration is at a right angle to the direction of propagation of the wave.

Question 16

What is the defenition of a longitudinal wave?

Answer 16

A wave in whichthe vibration is forward and back, parellel to the direction of propagation of the wave.

Question 17

What are examples of transverse waves?

Answer 17

• Ripples on water
• Light and other electromagnetic waves
• Secondary seismic waves (slow moving vibrations in an eartquake S-waves)

Question 18

What changes when a wave passes through a different material?

Answer 18

The speed as well as the wavelength of the wave changes.

Question 19

What are eaxamples of transverse waves?

Answer 19

• Sound waves
• Primmary seismic waves (fast vibrating earthquakes P-waves)

Question 20

What stays the same when a wave passes through a different material?

Answer 20

The frequency (the number of waves produces made per second) stays the same.

Question 21

How do speed and direction change when waves travel from a denser to a less dense medium?

Answer 21

Speed: Faster (deep => shallow)
Direction: Away from the normal

Question 22

How do speed and direction change when waves travel from a less dense to a denser medium?

Answer 22

Speed: slower (shallow => deep)
Direction: Towards the normal

Question 23

What is the deffinition of refraction?

Answer 23

When a wave spreads out as it travels through a gap or past the edge of an object.

Question 24

When is diffraction greatest?

Answer 24

When the width of the gap is equal to the wave length of the waves being diffracted.

Question 25

What happens when a wave passes through a gap?

Answer 25

Question 26

What factors increase diffraction?

Answer 26

The gap size (bigger => less) (smalle => more)

Question 27

Draw a diagram of a ray that is reflected and refracted from a object.

Answer 27

Question 28

The closer the incident is to the normal, the ____ light is reflected
Less, More

Answer 28

Less