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This question is about reflection and refraction of light - Edexcel - GCSE Physics - Question 3 - 2022 - Paper 1
Question 3
This question is about reflection and refraction of light. (a) (i) Figure 4 shows a ray of light travelling to a plane mirror. On Figure 4, draw the ray of light af... show full transcript
Worked Solution & Example Answer:This question is about reflection and refraction of light - Edexcel - GCSE Physics - Question 3 - 2022 - Paper 1
Step 1
Draw the reflected ray on Figure 4
Answer
To indicate the reflection of light off the plane mirror:
- Draw the incoming ray towards the mirror.
- Identify the angle of incidence, which is the angle between the incoming ray and the normal line at the point of incidence.
- From the point where the incoming ray strikes the mirror, draw the reflected ray, which should mirror the incoming ray's angle relative to the normal.
- Ensure that the angle of reflection is equal to the angle of incidence.
Step 2
Draw the refracted ray on Figure 5
Answer
To indicate the refraction of light as it enters the glass block:
- Start with the incoming ray from the air striking the glass surface.
- Draw the normal line at the point of incidence.
- Recognize that the light will bend towards the normal upon entering the denser medium (the glass).
- Draw the refracted ray in the bottom right quadrant of the diagram, demonstrating that the angle of refraction is less than the angle of incidence.