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Flashcards in Lenses Deck (11)
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1
Q

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

A

Refraction and it changes direction

2
Q

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?

A

It refracts towards the normal

3
Q

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

A

Bigger

4
Q

What does a higher refractive index mean?

A

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

5
Q

What does a converging (convex) lens look like?

A

It is thicker in the middle than at the edges

6
Q

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

A

Pass through the principle focus

7
Q

What is the focal length?

A

The distance between the principle focus and the lens

8
Q

What does a diverging (concave) lens look like?

A

It is thinner in the middle than at the edges

9
Q

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

A

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

10
Q

Does a diverging lens create a real or virtual image?

A

Virtual

11
Q

What is the image formed by a diverging lens?

A

Upright, diminished, virtual