Figure 11 shows the position of three types of wave in the electromagnetic spectrum - AQA - GCSE Physics - Question 4 - 2019 - Paper 1
Question 4
Figure 11 shows the position of three types of wave in the electromagnetic spectrum.
Which letter represents infrared in the electromagnetic spectrum? Tick (✓) one ... show full transcript
Worked Solution & Example Answer:Figure 11 shows the position of three types of wave in the electromagnetic spectrum - AQA - GCSE Physics - Question 4 - 2019 - Paper 1
Step 1
Which letter represents infrared in the electromagnetic spectrum?
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Answer
Infrared is represented by letter B in the electromagnetic spectrum.
Step 2
What is infrared used for?
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Answer
Infrared is used for electrical heating, which is an essential application in various heating devices.
Step 3
How does the image of a trapped person change if the person's body temperature drops from 37 °C to 33 °C?
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Answer
The image of the trapped person would appear more red as the infrared camera may detect a lower heat signature, reflecting the reduced body temperature.
Step 4
Complete the sentence. In this investigation the type of surface is __________________ variable.
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Answer
In this investigation the type of surface is the independent variable.
Step 5
Describe how the equipment shown in Figure 13 would be used to compare the infrared radiation emitted from the vertical surfaces of the cube.
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Answer
To compare the infrared radiation, hot water should be poured into the hollow metal cube. The infrared detector should be pointed at each vertical surface, with measurements taken from the same distance away to ensure consistency.
Step 6
What is the resolution of the infrared detector?
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Answer
The resolution of the infrared detector is 0.1 °C.
