Mirror and lens notes

Mirror and Lens Informaton

1. à (
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How Light Moves

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2. Review

When light strikes an object, 3 things can happen.

3. Reflection Off A Plane Mirror

Light reflects off a plane (flat) mirror in a certain way.

Incident Ray Normal Reflected Ray

Angle of
incidence

Angle of

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Plane Mirror

4. d

Law of Reflection

The Law of Reflection states that for a plane mirror:

Incident Ray Normal Reflected Ray

Angle of Angle of
incidence incidence

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Plane Mirror

5. Images In A Plane Mirror

Light rays reflect off a plane mirror in a

This makes the light rays seem to come from

behind the mirror at an equal distance.

This forms an image that is
and the

Itisa , since
the light is not actually
coming from the image.

6. Forming A Virtual Image

Virtual Image
Upright
Same Size

Reversed

7. Concave Mirrors

Concave mirrors have surfaces that

A concave mirror reflects light rays so that
they converge (meet) at a certain point.

We call this point the
of the mirror.

8. Concave Mirrors

Concave mirrors form images in

The type of image depends on the distance

the object is placed from the focal point.

Focal Point

9. 1. Object is placed the focal point.

10. Convex Mirrors

Convex mirrors have surfaces that curves

A convex mirror reflects light rays
so that they diverge (spread out).

The light rays do
meet at a focal point
in front of the mirror.

11. Convex Mirrors

Convex mirrors ALWAYS form images the

A convex mirror forms a virtual image

that is smaller than the true object.

Focal Point

12. Refraction

Refraction is when light rays are bent.

When light rays pass from one material to
another, the light rays refract (bend).
The rays change direction
where the 2 materials meet. e
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The light bends because it (AS

changes speed in different
materials (mediums).

13. Refraction

Light travels fast

Light travels slow

14. Index of Refraction

Some mediums refract light rays more than others.

This isdescribed by the index of refraction.

15. Index of Refraction

Some mediums refract light rays more than others.

This isdescribed by the index of refraction.

16. Index of Refraction

Some mediums refract light rays more than others.

This isdescribed by the index of refraction.

17. Index of Refraction

Indexes of Refraction for Common Materials

Vacuum

Water
Glycerine
Glass

Diamond

Air

18. Lenses

A lens is a curved device that refracts light precisely.

Lenses are useful because they can
refract light rays in a predictable way.

There are 2 types of lenses:

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Concave Convex

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19. Concave Lens

A concave lens is in the middle.

A concave lens bends parallel light

rays to make them diverge.

Produce a
virtual image

20. Convex Lens

A convex lens is thicker in the middle.

A convex lens bends parallel light rays

so that they meet at a focal point.

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Produce a
real or a
virtual image

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21. Lenses

Lenses have many uses.

22. "FSE Y

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