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Which of the following waves cannot be polarised?
1
A radio
B ultrasonic
C microwave
D ultraviolet
(Total 1 mark)
The sound quality of a portable radio is improved by adjusting the orientation of the aerial.
2 Which statement is a correct explanation of this improvement?
A The radio waves from the transmitter are polarised.
B The radio waves from the transmitter are unpolarised.
C The radio waves become polarised as a result of adjusting the aerial.
D The radio waves become unpolarised as a result of adjusting the aerial.
(Total 1 mark)
Which one of the following properties of light waves do polarising sunglasses depend on for their
3 action?
Light waves may
A interfere constructively.
B interfere destructively.
C be polarised when reflected from a surface.
D be polarised by the lens in the eye.
(Total 1 mark)
(a) State the difference between transverse and longitudinal waves.
4
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