1. (a) Draw one line from each use of wave to the matching electromagnetic wave - Edexcel - GCSE Physics - Question 1 - 2020 - Paper 1
Question 1
1. (a) Draw one line from each use of wave to the matching electromagnetic wave.
One line has been drawn for you.
to detect forged banknotes
microwaves
to detect ... show full transcript
Worked Solution & Example Answer:1. (a) Draw one line from each use of wave to the matching electromagnetic wave - Edexcel - GCSE Physics - Question 1 - 2020 - Paper 1
Step 1
to detect forged banknotes
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Answer
radio waves
Step 2
to detect broken bones
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Answer
X-rays
Step 3
for night-vision cameras
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infrared waves
Step 4
to sterilise medical equipment
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Answer
gamma rays
Step 5
Ultraviolet light has a higher frequency than infrared light. Which of these colours of visible light has the highest frequency?
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Answer
B green
Step 6
Describe how the brightness changes with wavelength.
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Answer
The brightness increases as the wavelength decreases, reaching a peak around 420 nm, then decreases again as the wavelength continues to shorten.
