waves

Question 1

transverse waves

Answer 1

a wave where the direction of the wave is perpendicular to the direction if the vibration

Question 2

longitudinal wave

Answer 2

a wave where the direction if the wave is parallel to the direction of the vibration (sound)

Question 3

reflection

Answer 3

the bouncing of waves off an obstacle in their path

Question 4

refraction

Answer 4

the changing of direction of a wave as it enters a region where its speed is different

Question 5

diffraction

Answer 5

the sideways spreading of waves into the region beyond a gap or around an obstacle

Question 6

interference

Answer 6

when two waves from two sources meet, a new wave is produced. the displacement produced at any point by this wave is the algebraic sum of their displacements that each wave would produce on its own

Question 7

constructive interference

Answer 7

when waves from two sources meet and the amplitude of the resulting wave is greater than the amplitudes of the individual waves

Question 8

destructive interference

Answer 8

when waves from two sources meet and the amplitude of the resulting wave is less than the amplitude of the individual waves

Question 9

coherent sources

Answer 9

two sources of waves are said to be coherent if they are in phase or if there is a constant phase difference between waves from each of the sources, the sources must also have the same frequency

Question 10

interference pattern

Answer 10

the resulting pattern when waves from two or more coherent sources meet

Question 11

stationary waves

Answer 11

when two periodic travelling waves off the same frequency and amplitude moving in opposite directions meet, they interfere with each other resulting in a stationary or standing wave

Question 12

doppler effect

Answer 12

the apparent change in frequency of waves due to the motion of the source or the observer