The phenomenon of total internal reflection can occur when light travels from:
Show answer & explanation
Correct answer: D
Explanation
Correct Answer:
A denser medium to a rarer medium at an angle of incidence greater than the critical angle.
Explanation:
Total Internal Reflection (TIR) occurs when light travels from a denser medium to a rarer medium and the angle of incidence is greater than the critical angle. Under these conditions, light does not refract but is completely reflected back into the denser medium.
Key Points:
TIR occurs only from denser to rarer medium
Angle of incidence must be greater than the critical angle
Light is completely reflected internally
It is used in optical fibers
Additional Facts:
Optical fiber communication works on this principle
The brilliance of diamonds is due to TIR
The critical angle is the minimum angle at which TIR occurs
Important Questions:
Q1: When does TIR occur?
Ans: From denser to rarer medium when the angle is greater than the critical angle
Q2: What is the critical angle?
Ans: The minimum angle of incidence at which TIR occurs
Q3: Where is TIR used?
Ans: In optical fiber communication