Reflections in Mirrors: Diagrams showing light paths through a periscope and from a ray box to a sensor, with labeled components and angles.

- For task 1: Draw a ray from the tree horizontally to the top mirror, reflect it vertically downward to the bottom mirror, then reflect it horizontally to the eye. Ensure each reflection follows the law of reflection (angle of incidence equals angle of reflection) relative to the normal at each mirror surface.
- For task 2: Trace the path backward from the sensor to the last mirror, then to the middle mirror, and finally to the light source inside the box. At each mirror, draw the incident ray approaching the mirror, the reflected ray leaving the mirror, and the normal line perpendicular to the mirror surface at the point of reflection. The angle between the incident ray and the normal should equal the angle between the reflected ray and the normal.
- For task 3: At any mirror surface in the diagram, label the incoming ray as “incident ray,” the outgoing ray as “reflection ray,” the dashed line perpendicular to the mirror as “normal line,” the angle between the incident ray and the normal as “angle of incidence,” and the angle between the reflection ray and the normal as “angle of reflection.”
- For the extension: Measure the angle of incidence and angle of reflection at three different mirrors. You will notice that for each mirror, the angle of incidence is equal to the angle of reflection.