Total Internal Reflection

The critical angle is the angle of refraction in denser medium in which the angle of incidence in less dense medium is 90º.

• True

• False

If the angle of incidence is larger than the critical angle of a medium, total internal reflection occurs.

• True

• False

Which diagram correctly describes the critical angle c for air-water surface?

• A

• B

• C

• D

Light travels through a glass block as shown. Which angle is the critical angle for light in the glass?

• A

• B

• C

• D

In which diagram is the path of the light ray NOT correct?

(Determine if the light ray is correctly bending towards or away from normal at each boundary)

P/S: Perspex is acrylic plastic.

• A

• B

• C

• D

Tags

NGSS.HS-PS4-1

The refractive index of a glass prism is 1.9. Determine its critical angle.

• 23^o

• 30^o

• 32º

• 35^o