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
D refraction. Refraction is the bending of light as it passes from one medium to another, such as from air to glass.
Step 2
Use the graph to calculate a value for angle Y
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Answer
To determine angle Y, select any pair of coordinates from the line on Figure 3. For example, one could use (20, 10) or (14, 6). The calculated values would typically fall within the range of 0.6(0) to 0.7(0).
Step 3
Use the graph to calculate a value for angle X
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Answer
Similarly, angle X can be calculated using coordinates from the graph. Follow the same method of selecting any appropriate pair from the line.
Step 4
Calculate the frequency of yellow light.
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Answer
Using the known values: speed = ( 3.0 \times 10^8 ) m/s and wavelength = ( 5.8 \times 10^{-7} ) m, we apply the equation:
[
frequency = \frac{speed}{wavelength} = \frac{3.0 \times 10^8 ext{ m/s}}{5.8 \times 10^{-7} ext{ m}} \approx 5.17 \times 10^{14} ext{ Hz}
]
