There are different groups of waves in the electromagnetic spectrum - AQA - GCSE Physics - Question 3 - 2021 - Paper 1
Question 3
There are different groups of waves in the electromagnetic spectrum. Figure 8 shows the position of three groups of the waves.
Figure 8
Which letter shows the posi... show full transcript
Worked Solution & Example Answer:There are different groups of waves in the electromagnetic spectrum - AQA - GCSE Physics - Question 3 - 2021 - Paper 1
Step 1
Which letter shows the position of infrared?
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Answer
The letter that shows the position of infrared is B.
Step 2
Complete the sentence.
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Answer
In this investigation, the distance between each flask and the infrared heater is the independent variable.
Step 3
Describe how the equipment in Figure 9 could be used to test this hypothesis.
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Answer
To test the hypothesis that the surface colour of the flask affects the amount of infrared absorbed, the following steps can be taken:
Record Initial Temperatures: Measure and record the initial temperature of the two thermometers in each flask to ensure they start at the same temperature (this establishes a control variable).
Switch on the Infrared Heater: Turn on the infrared heater and start a stopwatch at the same time, ensuring consistent heating conditions.
Monitor Temperature After Five Minutes: After five minutes, record the final temperature from each flask.
Compare Temperature Increases: Determine the temperature increase for both the black and silver flasks by calculating the difference between the initial and final temperatures.
Analyze Results: Finally, compare how much the temperature has increased in both flasks to determine the effect of surface colour on infrared absorption.
Step 4
Which one of the results for the black flask is anomalous?
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Answer
The anomalous result for the black flask is 17 °C from Test 2, as it is lower than expected compared to the other tests.
Step 5
What should the student do with the anomalous result?
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Answer
The student should ignore the anomalous result or repeat the measurement to verify accuracy.
Step 6
Calculate the mean temperature increase for the silver flask.
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Answer
To calculate the mean temperature increase for the silver flask, sum the temperature increases for all tests: 10 + 12 + 11 = 33 °C. Then divide by the number of tests: 33 ÷ 3 = 11 °C. Therefore, the mean temperature increase is 11 °C.
Step 7
What conclusion can be made from Table 1?
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Answer
The conclusion that can be made from Table 1 is that the black flask absorbed the most infrared during the five minutes.
