Science: Light direction 2 | Worksheet | PrimaryLeap.co.uk - Free Printable

Problem Description:

The task is to draw the lines of reflected light for each diagram provided. The diagrams involve different objects and light sources, and we need to apply the principles of reflection to determine how light behaves when it interacts with these objects.

Key Concepts:

1. Reflection of Light: When light hits a surface, it bounces off according to the law of reflection. The law states:
- The angle of incidence (the angle between the incident ray and the normal) is equal to the angle of reflection (the angle between the reflected ray and the normal).
- The incident ray, the reflected ray, and the normal (a line perpendicular to the surface at the point of incidence) all lie in the same plane.

2. Normal: A line drawn perpendicular to the surface at the point where the light ray strikes the surface.

Solution:

#### Diagram 1: Sunlight hitting an eye
- Incident Ray: Light from the sun travels in a straight line toward the eye.
- Reflection: Since the eye is not a reflective surface like a mirror, we assume that the light is absorbed or scattered rather than reflected. However, if we were to consider a hypothetical reflective surface near the eye, the reflected ray would follow the law of reflection.
- Action: Draw a straight line from the sun to the eye as the incident ray. If reflecting, draw the reflected ray symmetrically on the other side of the normal.

#### Diagram 2: Sunlight hitting a tree
- Incident Ray: Light from the sun travels in a straight line toward the tree.
- Reflection: Trees are not perfect reflectors; they scatter light in many directions due to their rough surfaces. However, for simplicity, we can assume some light is reflected directly.
- Action: Draw a straight line from the sun to the tree as the incident ray. Draw a reflected ray at an angle equal to the incident angle relative to the normal at the point of incidence.

#### Diagram 3: Flashlight shining on a mirror
- Incident Ray: Light from the flashlight travels in a straight line toward the mirror.
- Reflection: The mirror is a smooth, reflective surface. The angle of incidence equals the angle of reflection.
- Action: Draw a straight line from the flashlight to the mirror as the incident ray. At the point of incidence, draw the normal (perpendicular to the mirror). Then, draw the reflected ray symmetrically on the other side of the normal, ensuring the angles are equal.

#### Diagram 4: Flashlight shining downward
- Incident Ray: Light from the flashlight travels downward.
- Reflection: Assuming the surface below is flat and reflective, the light will reflect according to the law of reflection.
- Action: Draw a straight line downward from the flashlight as the incident ray. At the point of incidence, draw the normal (perpendicular to the surface). Then, draw the reflected ray symmetrically on the other side of the normal, ensuring the angles are equal.

#### Diagram 5: Light shining on a flat reflective surface
- Incident Ray: Light travels in a straight line toward the flat surface.
- Reflection: The flat surface is reflective, so the light will reflect according to the law of reflection.
- Action: Draw a straight line as the incident ray. At the point of incidence, draw the normal (perpendicular to the surface). Then, draw the reflected ray symmetrically on the other side of the normal, ensuring the angles are equal.

Final Answer:

For each diagram, draw the incident ray from the light source to the object/surface. At the point of incidence, draw the normal (perpendicular to the surface). Then, draw the reflected ray symmetrically on the other side of the normal, ensuring the angle of incidence equals the angle of reflection.

\boxed{\text{Follow the steps above to complete the diagrams.}}