G10 Science Quiz 2.2 Refraction and Lenses Review

The diagram shows a ray of light going from medium A into medium B. Which one of the following statements cannot be correct?

• A is air and B is glass.

• A is water and B is vacuum.

• A is water and B is air.

• A is glass and B is vacuum.

A ray of light is shone on a rectangular glass block as shown. Identify A, B and C.

• A = Refracted ray, B = Incident ray, C = Normal

• A = Incident ray, B = Refracted ray, C = Normal

• A = Normal, B = Refracted ray, C = Incident ray

• A = Refracted ray, B = Angle of incidence, C = Angle of refraction

When a drinking straw is placed in a container of water so that it is partly submerged, it appears bent because of

• apparent depth

• Snell's Law

• Refraction

• lateral inversion

The diagram shows a ray of light AB striking the interface of medium X and medium Y. BC is the refracted ray. Which one of the following statements is correct?

• Medium X is optically less dense than Y and ray BC travels faster than AB.

• Medium X is optically denser than Y and ray BC travels slower than AB.

• Medium X is optically denser than Y and ray BC travels faster than AB.

• Medium X is optically less dense than Y and ray BC travels slower than AB.

A light ray does not bend at a boundary between two media of different optical densities if its angle of incidence is

• 180^o

• 45^o

• 0^o

• 90^o

When light travels from air into water, the light bends ____________.

• towards the normal line

• away the normal line

• perpendicular to the normal line

• in an odd shape

A light ray is incident on a glass block as shown. Identify the correct statement.

• The glass block is optically denser than the medium outside and the ray bends towards the normal.

• The glass block is optically less dense than the medium outside and the ray bends away from the normal.

• The glass block is optically denser than the medium outside and the ray bends away from the normal.

• The glass block is optically less dense than the medium outside and the ray bends towards the normal.

What is a line drawn at 90° to a surface called?

• incident ray

• normal line

• refracted ray

• tangent

In what medium does light travel the fastest?

• vacuum
• air
• water
• glass

How is light affected by an increase in the index of refraction?

• Its frequency increases
• Its frequency decreases
• Its speed increases
• Its speed decreases