Waves

Question 1

Oscillations are perpendicular to the direction of what ?

Answer 1

The wave energy

Question 2

Waves do NOT need what to travel ?

Answer 2

A medium

Question 3

LONGITUDINAL WAVES :

What is the properties of longitudinal waves ?

Answer 3

Parallel to the direction of waves

Question 4

Example of longitudinal wave ?

Answer 4

Sound wave

Question 5

What is the WAVELENGTH?

Answer 5

Distance from wave crest to another wave crest

Measured in metres (m)

Question 6

FREQUENCY ?

Answer 6

Number of waves passing at a fixed point in 1 seconds

Measured in hertz (h)

Question 7

TIME PERIOD ?

Answer 7

Time taken by waves to pass in a fixed position

Measured in seconds

Question 8

EQUATION FOR TIME PERIOD:

Answer 8

T= 1 % F

Question 9

WAVE SPEED FORMULA :

Answer 9

Wave speed = frequency X wave length

Question 10

SOUND WAVES :

What are sound waves caused by ?

Answer 10

By vibrations

Question 11

What type of wave is a sound wave ?

Answer 11

Longitudinal

Question 12

What can sound waves travel through?

Answer 12

Solid ,liquids and gases (medium)

Question 13

What can waves not travel through ?

Answer 13

Space because there are not particles in space to carry them

Question 14

FREQUENCY AND SOUND :

Answer 14

• sound waves CAN reflect
• high frequency=high pitch
• low frequency =low pitch

Question 15

AMPLITUDE AND SOUND:

Answer 15

• related to volume of sound

- higher the amplitude the LOUDER the sound

Question 16

What is used to measure speed of waves ?

Answer 16

Ripple tank

Question 17

What happens when the voltage of a wave is high ?

Answer 17

More oscillation meaning more frequency

When frequency increases so does the waves so the waves will decrease

Question 18

WHAT IS A REFLECTION?

Answer 18

BOUNCING BACK of waves striking on a surface .

Question 19

INCIDENT RAY ?

Answer 19

Angles are EQUAL to angle in REFLECTION

Question 20

What does sound waves create ?

Answer 20

ECHO.