Year 8 refraction

What is this called?

• refraction
• reflection
• reconstroction
• retraction

Tags

NGSS.MS-PS4-2

Does light travel faster or slower in glass than air?

• faster

• slower

Reflection is to bouncing as refraction is to:

• bending.

• breaking.

• dissipating.

• halting.

A student placed a pencil in a cup of water. The pencil appears broken because light

• always travels in a straight line.

• bends when it passes through water.

• makes the water in the glass evaporate.

• reflects the pencil on the water's surface.

Tags

NGSS.MS-PS4-2

When light passes at an angle to the normal from one medium into another in which its speed is lower

• it is bent towards the normal.

• it always lies along the normal.

• it is unaffected.

• it is bent away from the normal.

Tags

NGSS.MS-PS4-2

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

• incident ray

• normal line

• refracted ray

• tangent

Swimming pools and the ocean look shallower than they really are due to:

• reflection 
• dispersion
• refraction
• total internal reflection

What type of lens is wider in the middle than on the edges?

• Concave

• Convex

• Objective

• Ocular

What type of lens is thinner in the middle than at the edges?

• Convex

• Concave

• Objective

• Magnifying

A ray of light in air is incident at an angle on one side of a rectangular glass block, as shown. Which ray diagram correctly describes the complete path of the ray of light?

(Determine if light bends towards or away from normal at each boundary)

• 
• 
• 
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Tags

NGSS.MS-PS4-2