Refraction of Light & Total Internal Reflection

10 fill-in-the-blank flashcards covering refraction, critical angle, total internal reflection, Snell's law, and related optical phenomena.

The angle of incidence in the denser medium for which the angle of refraction in the rarer medium is 90° is called the __.

critical angle (ic)

Total internal reflection occurs when the angle of incidence is __ than the critical angle.

greater

According to __, n₁ sin i = n₂ sin r.

Snell's law

When light passes from a denser to a rarer medium, it bends __ the normal.

away from

The ratio Real Depth (RD) to Apparent Depth (AD) equals the __ of the medium.

refractive index

The __ of stars is an atmospheric phenomenon explained by refraction.

twinkling

The oval shape of the sun during sunrise and sunset illustrates the phenomenon of __.

refraction of light

Optical shift is given by Shift = Real Depth – __.

Apparent Depth

For incidence angles exceeding the critical angle, light is __ reflected inside the denser medium.

totally internally

The angle of refraction that corresponds to the critical angle is __ degrees.

90