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 because all electromagnetic waves, including visible light and microwaves, move at the speed of light in a vacuum, 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 colours in order of frequency from low to high are red, orange, yellow, green, blue, and indigo. Therefore, the missing colours in the diagram are:
red
orange
green
Step 3
State two uses for microwaves.
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Answer
Two uses for microwaves include:
Cooking food, as microwaves heat food quickly and efficiently.
Satellite transmissions, as microwaves are used for communication between satellites and ground stations.
