Unit 4

A plane mirror produces a/an 

• a small, real image
• a large, real image
•  a small, virtual image
• a same sized, virtual image

The point at which rays parallel to the optical axis is called the 

• reflection point
• focal point
• refraction point

What causes the pencil to look broken when placed in water?

• Refraction
• Deflect
• Reflection
• Opaque

Light travels...

• A. in ovals
• B. in circles
• C. in squares
• D. in straight lines

According to the law of reflection, the angle of incidence is equal to the....

• size of the mirror

• shape of the light source

• angle of refraction

• angle of reflection

If light passes from air to glass and the refractive index of the glass is 2.0, what happens to the speed of the light in the glass?

• it doubles

• it halves

• it triples

• it quaduples

The diagram shows a ray of light directed at a plane mirror.

What are the angle of incidence and the angle of reflection?

• i = 40 & r = 40

• i = 40 & r = 50

• i = 50 & r = 40

• i = 50 & r = 50

We can see objects because of_______

• reflection
• refraction
• transmission
• diffraction

The speed of light in air is ___________ the speed of light in glass.

• the same as

• Greater than

• Less than

• Impossible to say

In what medium does light travel the fastest?

• vacuum
• air
• water
• glass