Lenses

Question 1

What is it called when a ray of light crosses the boundary between two different transparent materials and what happens?

Answer 1

Refraction and it changes direction

Question 2

When a light is travelling through a dense medium, such as glass, from a less dense medium, such as air, what happens to the ray of light?

Answer 2

It refracts towards the normal

Question 3

Is the angle of incidence bigger or smaller than the angle of refraction when the light beam bends towards the normal?

Answer 3

Bigger

Question 4

What does a higher refractive index mean?

Answer 4

The more the light changes direction when it enters that medium from air

Question 5

What does a converging (convex) lens look like?

Answer 5

It is thicker in the middle than at the edges

Question 6

What do parallel rays of light refracted by a converging lens do?

Answer 6

Pass through the principle focus

Question 7

What is the focal length?

Answer 7

The distance between the principle focus and the lens

Question 8

What does a diverging (concave) lens look like?

Answer 8

It is thinner in the middle than at the edges

Question 9

What do parallel rays of light refracted by a diverging lens do?

Answer 9

They spread out as if they come from a single point which is the principle focus

Question 10

Does a diverging lens create a real or virtual image?

Answer 10

Virtual

Question 11

What is the image formed by a diverging lens?

Answer 11

Upright, diminished, virtual