Question

Total internal reflection takes place:

• A. When a ray moves from denser medium to rarer medium and incident angle is greater than critical angle
• B. When a ray moves from rarer medium to denser medium and incident angle is less than critical angle
• C. When a ray moves from rarer medium to denser medium and incident angle is equal to critical angle
• D. None of the above

Answer 1

The correct option is A When a ray moves from denser medium to rarer medium and incident angle is greater than critical angle

Total internal reflection is defined as the complete reflection of a light ray at the boundary of two media when the ray is in the medium with greater refractive index.Total internal reflection takes place in two following conditions: When the light is in the more dense medium and approaching the less dense medium.