1. Week 8 Notes Mirrors and lenses

2. Reflection of Light Ways
Reflection you see in a mirror depends on how the surface _REFLECTS_ light.
Light waves are straight lines called __RAYS__.
The 2 ways in which a surface can reflect light are __REGULAR_ reflection and _DIFFUSE_ reflection.

3. Regular Reflection and Diffuse Reflection
Parallel rays of light hit a __SMOOTH__ surface, ___REGULAR___ reflection occurs.
All of the light rays are reflected at the __SAME__ angle.
Diffuse
Parallel rays of light hit a __BUMPY_ or uneven surface is ___DIFFUSE__ reflection.
Rays reflect at a __DIFFERENT___ angles.

4. Plane Mirrors
A plane mirror is a __FLAT_ sheet of glass that has a __SMOOTH_, silver-colored coating on 1 side.
An __IMAGE___ is a copy of an object formed by ____REFLECTED__ or __REFRACTED__ rays of light.
How it’s made Mirror – 5:57

5. What kind of image forms
The image you see in a plane mirror is a ___VIRTUAL____ ____IMAGE____.
___VIRTUAL___ describes something that does not really exist.
A plane mirror produces a virtual image that is __UPRIGHT__ and the __SAME__ size as the object.
The ___LEFT___ and __RIGHT__ are reversed

6. Concave Mirrors
A mirror with a surface that curves __INWARD__ is called a ___CONCAVE___ mirror.
The optical axis is like the ____EQUATOR___.
The point at which rays parallel to the optical axis meet is called ___FOCAL__ ___POINT

7. Determining the Type of Image
Concave mirrors can form either __VIRTUAL__ images or __REAL__ images.
A __REAL_ image forms when rays actually meet.
A real image may be __LARGER__ or ____SMALLER____ than the object.
2 examples of a concave mirror are __MAKEUP MIRROR___ and ___HEADLIGHT___.

8. Convex Mirrors
A mirror with a surface that curves __OUTWARD____ is called a convex mirror.
Images formed by convex mirrors are always __VIRTUAL__ and __SMALLER__ than the object.
Advantage of a convex mirror is to allow a __LARGER__ area. Disadvantage is __SMALLER_ size, so it appears __FURTHER___ away.
Example of this is a ___PASSENGER – SIDE MIRROR_______.
Wooden Mirror: (2:19)

9. Refraction of Light Refraction in Different Mediums
When light rays enter a medium at an angle, the change in speed causes the rays to __BEND__.
Refraction in Different Mediums
Light travels the fastest in __AIR__ and the slowest in ___SOLID__
Index of refraction is a measure of how much a ray of light _BENDS__ when entering a material

10. Prisms and Rainbows Mirage
Red refracts the __LEAST___ and Violet refracts the ___MOST__.
Mirage
An image of a distant object caused by __REFRACTION__ of light is a ___MIRAGE___.

11. Lenses Convex Lenses A lens is a ____CURVED___ piece of glass.
Convex lens is __THICKER__ in the center than the edges.
A convex lens is like a ___CONCAVE___ mirror.
Water Death Ray: (2:31)

12. Concave Lenses
A concave lens is __THINNER___ in the __CENTER__ than the edges.
Concave lens can only produce __VIRTUAL__ images because ___PARALLEL___ light rays passing through the lens __NEVER___ meet.