A student investigates what happens when light travels from air to glass - Edexcel - GCSE Physics - Question 2 - 2018 - Paper 1
Question 2
A student investigates what happens when light travels from air to glass. Figure 2 shows some of the apparatus used in the investigation.
(i) In Figure 2, angle Y i... show full transcript
Worked Solution & Example Answer:A student investigates what happens when light travels from air to glass - Edexcel - GCSE Physics - Question 2 - 2018 - Paper 1
Step 1
In Figure 2, angle Y is the angle of
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Answer
The correct answer is D: refraction. This is because angle Y represents the angle of the light as it travels through the glass block, which indicates refraction.
Step 2
Use the graph to calculate a value for angle Y
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Answer
To calculate angle Y, any pair of coordinates from the graph line can be selected. For example, selecting coordinates such as (20, 14) gives an angle Y approximately equal to 60 degrees.
Step 3
Use the graph to calculate a value for angle X
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Answer
Similarly, angle X can be calculated based on the graph data. Using a coordinate such as (10, 6) yields an angle X of approximately 30 degrees.
Step 4
Calculate the frequency of yellow light.
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Answer
Using the formula for frequency:
frequency=wavelengthspeed
Substituting the values:
frequency=5.8×10−7 m3.0×108 m/s≈5.17×1014 Hz
Step 5
State the unit.
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