Reflection of Light
Reflection of light occurs when light bounces off a surface, following specific laws that explain how mirrors and other reflective surfaces
Core concept
The law of reflection states that the angle of incidence equals the angle of reflection, both measured from the normal (perpendicular line).
How it works
A plane mirror produces a virtual, upright image that is the same size as the object but laterally inverted (left-right reversed).
Why it matters
Regular reflection occurs on smooth surfaces (like mirrors), producing clear images, while diffuse reflection occurs on rough surfaces, scattering light.
Key detail
Understanding reflection helps explain how mirrors, periscopes, and other optical devices work in everyday applications.
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Quick notes
• Law of reflection: angle of incidence = angle of reflection.
• Both measured from the normal.
• Plane mirror: virtual, upright, same-size image.
• Image is laterally inverted (left-right reversed).
• Regular reflection: smooth surfaces, clear images.
• Diffuse reflection: rough surfaces, scattered light.
• This explains mirrors, periscopes.
• Understanding aids optical device design.