Light and Optics Quiz

The refraction diagram below shows that when the light ray passes from Air to Glass it

• speeds up

• slows down

• no change in speed

• no change in direction

The lens that is thicker in the middle than the edges is called a

• concave lens

• convex lens

• concave mirror

• convex mirror

Light travels through vacuum with a speed of 300, 000 km/s

• True

• False

The physical property of a medium that measures the bending of a light ray when passing from one medium to another is called

• refractive index

• incident angle

• convex lens

• ray

The diagram below shows a light ray that transmits from medium with lower index of refraction (Rarer medium) to a medium with higher index of refraction (Denser medium). How will the refracted ray move?

• closer to the normal because light will speed up.

• away from the normal because the light will slow down.

• closer to the normal because the light will slow down.

• away from the normal because the light will speed up.

The change in direction of a wave as it changes speed while moving from medium into another is called

• reflection

• diffraction

• refraction

• transmission

How does light behave when it passes through a lens?

• it reflects back

• it diffracts

• it is absorbed

• it refracts

When light moves from medium to another, its speed remains the same.

• True

• False

What does letters X and P define in this ray diagram?

• X: Focal point, P: Focal length

• X: Normal, P: Principal axis

• X: Focal length, P: Focal point

• X: Focal length, P: Principal axis