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Light Wave - Coggle Diagram

- - - - Law 1 : The angle of incidence (the incoming ray) is equal to the angle of reflection (the outgoing ray).
      - Law 2 : The incident ray, the reflected ray, and the normal line (a line drawn 90° to the surface) all lie on the same plane, meaning they’re flat and not in different directions.
    - - Diffuse reflection: Happens on rough surfaces like paper or walls, where light rays scatter in different directions, so no clear image is formed.
      - Regular (specular) reflection: Happens on smooth surfaces like mirrors, where the rays reflect evenly and form a clear image.
- - - - Law 1: The incident ray, the refracted ray, and the normal line all lie on the same plane.
      - Law 2
        
        i = angle of incidence,
        
        r = angle of refraction.
        
        👉 n₁ sin i = n₂ sin r
        
        Snell’s Law: The relationship between the angles and the refractive index is given by
        
        where n₁ and n₂ are refractive indices of the two media,
- - - - Umbra: The darkest part of a shadow where no light reaches.
      - Penumbra: The lighter outer region where some light reaches.