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Question 1
This question is about an experiment to measure the wavelength of microwaves. A microwave transmitter T and a receiver R are arranged on a line marked on the bench.... show full transcript
Step 1
Step 2
Answer
The minimum reading is not zero due to the phenomenon of standing waves resulting from the superposition of the incident and reflected microwaves. When reflections occur, there are points of constructive and destructive interference, leading to non-zero readings.
Step 3
Answer
To ensure that M is parallel to the marked line, the student can use the following procedure:
Step 4
Answer
The maximum gradient can be calculated by drawing a line of best fit through the highest data points while ensuring that it accounts for all error bars. Using data points from the graph, the maximum gradient is found to be approximately 2.3 × 10².
Step 5
Answer
The minimum gradient is determined by plotting a line of best fit that includes all the lowest data points and takes into account the error bars. From the data, the minimum gradient is approximately 2.5 × 10².
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Answer
The percentage uncertainty can be calculated using the formula: [ \text{percentage uncertainty} = \left(\frac{\text{uncertainty}}{\lambda}\right) \times 100 ] Substituting the values, if the uncertainty is 0.025 m: [ \text{percentage uncertainty} = \left(\frac{0.025}{2.4 × 10^2}\right) \times 100 \approx 0.0104% ]
Step 8
Answer
The graph in Figure 4 can be used to obtain the value of y by determining the y-intercept of the line of best fit. The y-intercept corresponds to the constant value in the equation that describes the relationship between the variables, indicating the distance y.
Step 9
Answer
If the data for n = 13 had not been plotted:
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