# 3 Mirrors by 6LpFCJ0M

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```									Mirrors
Physics
Mrs. Coyle
Plane Mirror

di=do
Plane Mirror

http://physics.bu.edu/~duffy/py106/Reflection.html
Type of Image
• Virtual
• Equal in Size
• Erect (Upright)
Spherical (Curved) Mirrors
• Concave

• Convex
Concave Mirror(Converging)

http://www.shokabo.co.jp/sp_e/optical/labo/
lens/lens.htm
Concave
Mirror
Converging Mirror

http://buphy.bu.edu/~duffy/PY106/22a.GIF
Summary for Concave Mirror
When object is:          Image is:
• Beyond C               • Between C and F

• At C                   • At C

• Between C and F        • Beyond C

• At F                   • No image

• Between F and mirror   • Virtual image
Mirror Equation
1=1+1
f do di
Magnification

M= hi = -di
ho do
Sign Convention
do +   object is in front of the mirror

di + real image, in front of the mirror
di - virtual image, behind the mirror

hi + erect image
hi - inverted image

f   + converging (concave) mirrors
f   - diverging (convex) mirrors
Convex Mirror (Diverging)

http://www.shokabo.co.jp/sp_e/optical/labo/lens/lens.htm
Convex Mirror (Diverging)
Summary for Convex Mirror
Always:

• Virtual, reduced, upright image
Simulation
• http://higheredbcs.wiley.com/legacy/colleg
e/halliday/0471320005/simulations6e/inde
x.htm?newwindow=true
Problem
• Find the image distance, height and type
for a 5cm object placed 60cm from a
concave mirror of focal length of 18cm.