Question

Write the condition for TIR

Answer 1

♦ When the ray of light strikes the boundary separating two different media then part of it is reflected and other part is( refracted.

★ If a ray of light is traveling from a denser to a rarer medium with angel of incidence greater than critical angle (i>∅c) This is the condition for TIR
Now
, then no reflection takes place
but ray of light is 100% reflected back to same medium, This phenomenon is known as TIR

Answer 2

conditions for TIR
☆the light ray must travel from denser to rarer medium .
☆the angle of incidence should be greater than critical angle.
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