Reflection

• Objects that produce their own light are called luminous objects e.g the Sun, fire, tube light, etc.
• Objects that don't produce their own light are called non-luminous objects e.g the Moon, wood, stones, etc.
• Transparent objects: are objects that allow light to pass through them and we can see through them
• Translucent objects: are objects that allow light to pass through them but we can't see through them e.g. bathroom, windows, oiled paper
• Opaque objects: are objects that don't allow light to pass through them, therefore we can't see through them e.g buildings, stones, etc.
• A ray is a path followed by light.
• A beam is a group of rays in a similar direction
• Incident rays: the ray that approaches the reflecting surface
• Reflected ray: ray that bounces off the reflecting surface
• Normal: a line perpendicular to the reflecting surface at the point of incidence
• Point of incidence: point that the incident ray strikes the reflecting surface
• Angle of reflection: angle between the incident ray and the normal
• Angle of reflection: angle between the reflected ray and the normal
• LAW OF REFLECTION

  It states that the angle of incidence is equal to the angle of reflection. i=r