Question

1. explain the law of reflection. include a picture of it with the incident ray, reflected ray, angle of incidence, angle of reflection, and normal clearly labeled.

Explanation:

The Law of Reflection is a fundamental principle in optics (a subfield of Physics, which is part of Natural Science). It states that when a light ray (incident ray) strikes a smooth, reflective surface, the reflected ray, the incident ray, and the normal (a line perpendicular to the surface at the point of incidence) all lie in the same plane. Additionally, 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), i.e., \( \angle i=\angle r \).

For the diagram: Draw a horizontal line representing the reflective surface. Draw a vertical dashed line (the normal) perpendicular to the surface at the point where the incident ray hits. Draw an incoming ray (incident ray) from above, making an angle with the normal. Then draw the reflected ray on the other side of the normal, such that its angle with the normal is equal to the incident ray's angle with the normal. Label the incident ray, reflected ray, angle of incidence (\( \angle i \)), angle of reflection (\( \angle r \)), and the normal clearly.

Answer:

The Law of Reflection states that: 1. The incident ray, the reflected ray, and the normal to the reflective surface at the point of incidence all lie in the same plane. 2. The angle of incidence (\( \angle i \)) is equal to the angle of reflection (\( \angle r \)) (\( \angle i = \angle r \)).

(For the diagram:

• Draw a horizontal line for the reflective surface.
• Draw a vertical dashed line (normal) perpendicular to the surface at the point of incidence.
• Draw an incident ray approaching the surface, making \( \angle i \) with the normal.
• Draw the reflected ray leaving the surface, making \( \angle r=\angle i \) with the normal.
• Label the incident ray, reflected ray, \( \angle i \) (angle of incidence), \( \angle r \) (angle of reflection), and the normal.)