Visible light and microwaves are both electromagnetic waves - Edexcel - GCSE Physics - Question 5 - 2017 - Paper 1
Question 5
Visible light and microwaves are both electromagnetic waves.
(a) (i) Complete the sentence by putting a cross (X) in the box next to your answer.
Electromagnetic w... show full transcript
Worked Solution & Example Answer:Visible light and microwaves are both electromagnetic waves - Edexcel - GCSE Physics - Question 5 - 2017 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
The correct answer is C: all travel at the same speed in a vacuum. This is fundamental to electromagnetic waves, as they propagate through the vacuum at the speed of light, which is approximately 3 x 10^8 m/s.
Step 2
Complete the diagram by writing in the four missing colours.
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Answer
The four missing colours in order of frequency are:
red
orange
green
blue
indigo
violet.
This illustrates the visible light spectrum from low frequency (red) to high frequency (violet).
Step 3
State two uses for microwaves.
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Answer
Cooking: Microwaves are commonly used in microwave ovens to cook food by agitating water molecules.
Communication: Microwaves are used in mobile phones and satellite transmissions for sending data over long distances.
