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This PowerPoint introduces students to the idea of light reflection. Included in this presentation you will find several diagrams that show how light is reflection in concave and convex mirrors.
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Reflection and MirrorsPages 548-551
What you will learn… Types of reflection How to use mirrors for image quality I can predict the path of reflected light
from flat, curved, or rough surfaces I can explain why the ground gets warm
during the day I can draw ray diagrams to indicate how
light reflects off objects or refracts into transparent media
When Light Strikes an Object Three options
Reflected, absorbed, or transmitted Most objects reflect or absorb
Opaque—a material that reflects or absorbs all of the light that strikes it Wood, metal, cotton
Transparent Objects that transmit light
Clear glass, water, & air
Translucent Materials that allow some light to pass
through
Translucent, Transparent, or Opaque
Translucent, Transparent, or Opaque
Translucent, Transparent, or Opaque
Translucent, Transparent, or Opaque
Reflection You can see most objects because light
reflects, or bounces, off them.
Regular Reflection Angle of Reflection = Angle of Incidence
Diffuse Reflection When parallel rays of light hit a bumpy,
or uneven surface Most objects reflect this way
Mirrors Sheet of glass that has a smooth, silver-
colored coating on one side.
Plane Mirrors Produces an image that is right-side up
and the same size as the object being reflected
Image is called “virtual image”
Concave Mirrors Mirror with a surface that curves inward Type of image depends on position
Convex Mirrors Mirror with a surface curved outward
Questions 1. Complete this diagram in your notes
Questions 2. Complete the ray diagram for this
concave mirror
Questions Complete the ray diagram for the
following convex mirror
Questions Why does the ground become warm
during the day?
Questions Explain the difference between a regular
reflection and diffuse reflection. Draw a diagram that supports your response