Grade 12Wave Optics

What is critical angle?

sathish b

10 Years agoGrade 12

3 Answers

PRAPULPODISHETTI

Approved Tutor Answer10 Years ago

Critical angle:

When a light ray is passing from denser medium to rarer medium, the angle of incidence in denser medium for which the angle of refraction becomes 90° in rarer.
Equation for critical angle is
sin i_c = n₂₁
Where n₂₁ = refractive index of the denser medium with respect to rarer medium.

SHANMUKESHWAR

10 Years ago

The critical angle is the angle of incidence above which the total internal reflection occurs. This is particularly common as an optical phenomenon, where light waves are involved, but it occurs with many types of waves, such as electromagnetic waves in general or sound waves.

KUNCHAM SAMPATH

10 Years ago

The smallest angle of incidence at which a light ray passing from one medium to another less refractive medium can be totally reflected from the boundary ...