1. Mirrors and Reflection

2. Angle of incidence equals the angle of reflection
Law of Reflection
Angle of incidence equals the angle of reflection
Whatever angle the light hits the surface, it will bounce back at the same angle

3. However…..
….the shape of the reflecting surface affects the way light reflects from it

4. Plane Mirror Has a flat surface Reflection is upright and same size
Images are reversed
Examples: bathroom mirror, rearview mirror in a car

5. Concave Mirror Curved inward
If the object is close to the mirror, the image is enlarged and upright
If the object is far away, the image is reduced in size and upside down
Examples: inside of a spoon, reflecting telescope, inside of a flashlight

7. Convex Mirror Curves outward The image is upright and smaller
Useful because they allow you to see a large area
Examples: side mirrors on cars, back of a spoon, used for security

9. Lenses and Refraction

10. The shape of the lens affects how the light will refract.

11. Convex Lens Thicker in the middle than at the edges
Light refracts towards the center (converges)
Examples: magnifying glasses, human eye, cameras, projectors

13. Concave Lens Thinner in the middle than at the edges
Light spreads out (diverges)
Examples: used in telescopes

15. How are lenses used to correct human vision?

16. Nearsightedness (Myopia)
Can only see an object clearly if its nearby
Eye is too long and the lens focuses light in front of the retina
Concave lens is used to correct this

18. Farsightedness (Hyperopia)
Can only see an object clearly if its far away
Eye is too short and lens focuses behind the retina
A convex lens is used to correct this