2. Waves

Question 1

2 marks

Answer 1

Wave B is longitudinal (1) because the direction of vibrations is parallel to the direction of wave travel. (1)

Question 2

Electromagnetic Waves are transverse. Explain why it is important to correctly align the aeriel of the TV in order to recieve the strongest signal. (2 marks)

Answer 2

Transmission radio waves are polarised (1) and so aerial must be aligned in the same plane. (1)

Question 3

Define the amplitude of a wave. (2 marks)

Answer 3

The maximum displacement (1) from the equilibrium position (1)

Question 4

The wave travels the right. Describe how the vertical displacement of the knot varies over the next complete cycle. (3 marks)

Answer 4

Question 5

A continuous wave of same frequency and amplitude as another wave, moves along the rope and through the first wave. The knot remains motionless. Explain how this could happen. (3 marks)

Answer 5

Question 6

State the characteristic feature of a transverse wave. (2 marks)

Answer 6

Particle vibration is perpendicular (1) to the direction of energy transfer. (1)

Question 7

2 marks

Answer 7

Variation in light intensities between maximum and minimum. (1) there are two maximas and two minimas during the 360 degrees turn. (1)

Question 8

Other than electromagnetic waves, give one example of a transverse wave. (1 mark)

Answer 8

Question 9

State one difference between transverse waves and longitdudinal waves. (1 mark)

Answer 9

Question 10

1 mark

Answer 10

Vertical line on B.

Question 11

2 marks

Answer 11