3.3.1 Progressive and Stationary Waves

Question 1

Progressive wave

Answer 1

Transmits energy without the translation of the median

Question 2

Amplitude of Progressive wave

Answer 2

Maximum displacement

Question 3

Wavelength of progressive wave

Answer 3

Distance between successive points in phase

Question 4

Frequency of progressive wave

Answer 4

Number of complete waves passing a point per second

Question 5

Phase difference

Answer 5

Time interval or phase angle by which one wave leads or lags another

Question 6

Longitudinal waves

Answer 6

Vibrations of the medium of parallel to the flow of energy

Question 7

Transverse waves

Answer 7

Vibrations of the median are perpendicular to the flow of energy

Question 8

Polarised wave

Answer 8

The electric and magnetic fields vibrate in only one plane at 90° to each other

Question 9

Principle of superposition

Answer 9

When two or more waves cross the resultant displacement equals the vector sum of the individual displacements

Question 10

Constructive interference when

Answer 10

AC-BC = wavelengths

Question 11

Destructive interference when

Answer 11

AC-BC = Half wavelengths

Question 12

Nodes

Answer 12

Amplitude = 0 no vibration ( not displacement )

Question 13

Antinodes

Answer 13

Maximum amplitude ( not displacement )