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Flashcards in Lenses Deck (11)
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1
Q

What is a Concave (Diverging) lens?

A

A lens that spreads beams of light out

2
Q

What is a Convex (Converging) Lens?

A

A lens that brings a beam of light to a focus (used in the eye)

3
Q

What type of vision problem do Concave Lens’ fix?

A

Short Sightedness

4
Q

What type of vision problem do Convex Lens’ fix?

A

Long Sightedness

5
Q

What is Short Sightedness?

A

In short sight, beams of light from a distant object focus in front of the retina
You can’t focus on distant objects

6
Q

How do Concave Lens’ correct Short Sightedness?

A

The concave lens spreads out the light so it focuses on the retina

7
Q

What is Long Sightedness?

A

In Long sight, beams of light from a nearby focus behind the retina
You can’t focus on nearby objects

8
Q

How do Convex Lens’ correct Long Sightedness?

A

The convex lens focuses the light closer in onto the retina

9
Q

What are the different types of image that lenses produce and what do they mean?

A
Magnified (made larger)
Upright (same way up as object)
Diminished (made smaller)
Inverted (upside down)
Virtual 
Real
10
Q

What are the uses of a Convex lens?

A
Magnifying Glass 
Camera 
Eye
Projector
Microscope
Telescope
11
Q

What are the uses of a Concave Lens?

A

Spy Holes

Back windows of Coaches