Chapter 12 - Wave Properties

Question 1

Transverse Wave definition

Answer 1

Oscillations are perpendicular to the direction of energy transfer

Question 2

Longitudinal wave definition

Answer 2

Oscillations are parallel to the direction of energy transfer

Question 3

Example of longitudinal wave

Answer 3

Sound waves

Question 4

Example of a transverse wave

Answer 4

Electromagnetic wave

Question 5

Compression definition

Answer 5

Area in longitudinal waves where the particles are close together

Question 6

Rarefaction definition

Answer 6

Area in longitudinal waves where particles are further apart

Question 7

Amplitude of a wave

Answer 7

Maximum displacement of a wave from its undisturbed position

Question 8

What property of a wave stays the same when it travels from one medium to another?

Answer 8

Frequency

Question 9

What happens when waves are absorbed by a substance?

Answer 9

Energy of the wave is transferred to the energy stores of the substance

Question 10

What happens when waves are transmitted at a boundary between two substances?

Answer 10

They carry on moving at different speeds

Question 11

4 things needed for a ray diagram

Answer 11

1. Use a ruler to draw all lines
2. Draw a single arrow on the waves to show direction
3. Draw a dotted line at right angles to the surface at the point of incidence
4. Label the normal, angle of incidence and the angle of reflection

Question 12

When reflection happens at a surface - what happens (angles)

Answer 12

Angle of incidence = angle of reflection

Question 13

4 things that can happen to waves

Answer 13

1. Absorption
2. Reflection
3. Refraction
4. Transmission