A student is investigating the reflection of light by a plane mirror using a standard ray-tracing method. They draw a line representing the mirror surface and insert pins to track the incident and reflected rays.

State the minimum recommended distance between two tracking pins ( $P_1$ and $P_2$ ) placed along an incident ray, and explain the physical reason for keeping these pins far apart.

The student wishes to investigate the relationship between the angle of incidence $i$ and the angle of reflection $r$ . To obtain a reliable conclusion, they need to select a suitable range of angles. Suggest a series of five suitable values for the angle of incidence $i$ that they could use.

Describe two experimental precautions that should be taken during this ray-tracing experiment to ensure that results are as accurate as possible.

Explain one practical reason why the measured angle of reflection might not exactly equal the theoretically predicted angle of reflection, even when the experiment is carried out carefully.

State the minimum recommended distance between two tracking pins ( $P_1$ and $P_2$ ) placed along an incident ray, and explain the physical reason for keeping these pins far apart.

Describe two experimental precautions that should be taken during this ray-tracing experiment to ensure that results are as accurate as possible.

Explain one practical reason why the measured angle of reflection might not exactly equal the theoretically predicted angle of reflection, even when the experiment is carried out carefully.

3.2.1a Reflection of light

Question 13

Markscheme

3.2.1a Reflection of light

Question 13

Markscheme

3.2.1a Reflection of light

Question 13

3.2.1a Reflection of light Questions

3.2.1a Reflection of light

Question 13

3.2.1a Reflection of light Questions