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.
use of wave electromagnetic wave
to detect f... 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 are used to detect forged banknotes due to their ability to penetrate materials and identify specific signatures of authentic notes.
Step 2
to detect broken bones
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Answer
Infrared waves are employed in medical imaging to detect broken bones, as they can provide clear images of internal structures.
Step 3
for night-vision cameras
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Answer
Ultraviolet waves are utilized in night-vision cameras to enhance visibility in low light conditions.
Step 4
to sterilise medical equipment
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Answer
Gamma rays are used to sterilise medical equipment because of their high energy, which effectively kills bacteria and viruses.
Step 5
Which of these colours of visible light has the highest frequency?
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Answer
Green light has the highest frequency among the options given.
Step 6
Describe how the brightness changes with wavelength.
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Answer
The brightness of a source of light increases with decreasing wavelength up to a certain point, after which it begins to decrease. This indicates a peak brightness at a specific wavelength, showcasing the relationship between wavelength and luminous intensity.
