REFRACTIVE INDEX

When light passes from air into water at an angle of 60° from the normal, what is the angle of refraction?

• 60°
  

• 40.6°

• 40°

• 4.6°

When light passes from air into water at an angle of 30° from the normal, what is the angle of refraction?

• 22.1°

• 30°

• 20°

• 35°

When light passes from water into diamond at an angle of 45° from the normal, what is the angle of refraction?

• 20.9°

• 20°

• 22°

• 22.9°

The refractive index of the lens of the human eye is 1.41. If a ray of light goes from the air into the lens at an angle of incidence of 55°, what is the angle of refraction?

• 3.5°

• 35.0°

• 35.5°

• 30.5°

A ray of light approaches a jar of honey at an angle of 30°. If the angle of refraction is 19.5°,what is the refractive index of honey?

• 1.49

• 1.50

• 1.05

• 1.51

A block of amber is placed in water and a laser beam travels from the water through the amber. The angle of incidence is 35° while the angle of refraction is 26°. What is the index of refraction of amber? If the refractive index of water is 1.33

• 1.74

• 1.88

• 1.47

• 1.50

Conditions for total internal reflection to occur are:

• Angle of incidence less than critical angle, light move from more dense medium to less dense medium.

• Angle of incidence greater than critical angle, light move from more dense medium to less dense medium.

• Angle of incidence greater than critical angle, light move from glass to air.

• Angle of incidence greater than angle of refraction, light move from more dense medium to less dense medium.