Photo AI
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. (i) In Figure 1, a... 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
Step 2
Explain what the student must do to test this conclusion in more detail.
Answer
To test the conclusion that angle Y is directly proportional to angle X, the student should conduct a series of experiments. They could measure angle Y while systematically varying angle X using a protractor and a laser beam. By taking multiple pairs of measurements for angles X and Y, they can plot a graph of angle Y against angle X. If angle Y is directly proportional to angle X, the graph should yield a straight line passing through the origin, confirming the proportional relationship.
Step 3
Calculate the frequency of yellow light.
Answer
To calculate the frequency of yellow light, we use the formula:
f = \frac{v}{\lambda}$$ Where: - $f$ is the frequency, - $v$ is the speed of light ($3.0 \times 10^8 \, m/s$), - $\lambda$ is the wavelength ($5.8 \times 10^{-7} \, m$). Substituting these values:f = \frac{3.0 \times 10^8}{5.8 \times 10^{-7}}$$
Calculating this, we find: