What are waves?
3 marks · NormalA mobile phone sends a text message using electromagnetic waves.
What do electromagnetic waves transfer from the phone to a nearby mast?
Do the air molecules between the phone and mast travel the distance, yes or no?
Explain your answer to part (b).
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(a) Energy (and information)
(b) No
(c) Electromagnetic waves transfer energy/information without moving the air molecules.
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Marking points
B1 (a) · 1 mark · States energy (and/or information) is transferred.
B2 (b) · 1 mark · Correctly states 'No', air molecules do not travel the distance.
B3 (c) · 1 mark · Explains that electromagnetic waves transfer energy/information without moving the molecules/matter.
Worked solution
a) Energy (and information) is transferred.
b) No.
c) Electromagnetic waves transfer energy but do not cause the air molecules to move from phone to mast.