1. (a) A student investigates what happens when light travels from air to glass - Edexcel - GCSE Physics Combined Science - Question 1 - 2018 - Paper 1
Question 1
1. (a) A student investigates what happens when light travels from air to glass.
Figure 1 shows some of the apparatus used in the investigation.
In Figure 1, angle... show full transcript
Worked Solution & Example Answer:1. (a) A student investigates what happens when light travels from air to glass - Edexcel - GCSE Physics Combined Science - Question 1 - 2018 - Paper 1
Step 1
In Figure 1, angle Y is the angle of
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Answer
The answer is C: reflection. This is because angle Y represents the angle at which light is reflected off the surface of the glass block.
Step 2
Explain what the student must do to test this conclusion in more detail.
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Answer
To test the conclusion that angle Y is directly proportional to angle X, the student should conduct a series of experiments by measuring angle Y for different values of angle X. The student should record the angles and plot the data on a graph. By observing whether a straight line is formed from the plotted points, the student can determine if there is a direct proportional relationship.
Step 3
Calculate the frequency of yellow light.
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Answer
We can calculate the frequency of yellow light using the formula:
frequency=wavelengthspeed
Substituting the known values:
frequency=5.8×10−7m3.0×108m/s
Calculating this gives:
frequency=5.17×1014Hz
Rounding this to two significant figures yields:
frequency≈5.2×1014Hz
Step 4
State the unit.
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