O-LevelPhysicsLight5054/22 · May/June 2020 · Q46 Marks
Two mirrors, A and B, are inclined at an angle of 60° to each other. Light strikes mirror A at an angle of 30°, as shown in Fig. 4.1. [Figure 4.1]
- (a)(i)Determine the angle of incidence at mirror A.[1]
- (a)(ii)Determine the angle of incidence at mirror B.[1]
- (a)(iii)Describe the path of the reflected ray after it leaves mirror B.[1]
- (b)A plane mirror hanging on a wall is used to form the image of an object. State three characteristics of the image formed. 1. 2. 3.[3]
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
Mark scheme
Marking points from the official mark scheme (May/June 2020). The mark or mark type is shown in brackets.
- [B1] 60°
- [B1] 0(°)
- [B1] back along the initial path
- [B3] Any three of • same size (as object) • same distance (from mirror as object) • upright • virtual • laterally inverted
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