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Mirrors
• Light rays- each narrow beam of light that travels in a straight line.
- A light source sends out light waves in all directions.
3 Types of mirrors
1. Plane
2. Concave
3. Convex
• There are 2 types of images mirrors can create.
1. Virtual image- upright, reflected image that is perceived by your brain even though no light passes through the image.
2. Real image- when the light comes together to form an image.
• Plane Mirror- flat smooth mirror.
It creates a virtual image.
Parts of a mirror• Optical axis- Imaginary straight
line drawn perpendicular to the surface of the mirror.
• Focal point- the point on the optical axis that every light ray will pass through.
• Focal length- the distance from the center of the mirror to the focal point.
• Concave Mirror- a mirror that is curved inward.-Light rays that hit a concave mirror come together after they are reflected.
Focal Point
Focal Length
Optical Axis
Focal Length
Focal Point
Optical Axis
• Convex Mirror- mirror that curves outward. Ex: Back of a spoon
-Light rays that hit a convex mirror will spread apart after they are reflected.
Focal Length
Focal Point
Optical Axis
Focal Length
Focal Point
Optical Axis
Mirror Type Image Size
Plane Upright Same
Concave
-Far away Upside down Smaller
-At focal point None None
-Very close Upright Larger
Convex Upright Smaller
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