Correct Option
The correct option isDiffused or irregular reflection
Explanation
Reflection of light is classified into two primary types based on the smoothness of the reflecting surface: regular (specular) reflection and diffused (irregular) reflection. The behavior of parallel rays of light upon striking a surface determines the type of reflection.
Detailed Analysis
- Diffused or Irregular Reflection: When parallel rays of light strike a rough or irregular surface, such as cardboard, paper, or a wall, the rays are reflected in various directions. This occurs because different points on the rough surface have different inclinations (normals). Although the laws of reflection hold true at every individual point, the collective result is scattered light. This scattering allows non-luminous objects to be visible from multiple angles.
- Regular (Specular) Reflection: This occurs when parallel rays of light strike a smooth, highly polished surface, such as a plane mirror. The reflected rays remain parallel to one another.
- Total Internal Reflection: This is a phenomenon associated with refraction, occurring when light travels from a denser medium to a rarer medium at an angle greater than the critical angle. It is not applicable to reflection from an opaque surface like cardboard.
Key Takeaway
Diffused reflection occurs on rough surfaces where parallel incident rays are scattered in different directions, which is the primary mechanism enabling the visibility of non-shiny objects.