What is the difference between TIR and normal reflection?


The difference between TIR and normal reflection are tabulated below.

Total Internal Reflection (TIR) Reflection of light
It only happens when light travels from a denser medium to a lighter medium.  When a light ray passes from a lighter medium to a denser medium, it will be reflected.
TIR arises only when some conditions are met. Reflection of light rays occur at any boundary between two optical media. 
All the light is reflected in total internal reflection. During normal reflection, only a portion of the total energy in the light is reflected. Parts of it are scattered, while others are refracted. 
In total internal reflection, the light intensity is higher, and the objects shine brighter than in ordinary reflection. Due to total internal reflection, diamonds sparkle. The brightness of normal reflection images is less.


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