Chapter 30

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# Chapter 30 - PowerPoint PPT Presentation

Chapter 30. Mirrors & Lenses. Plain Mirrors . Virtual Image Same size as object Equal distance from mirror “Flipped” Right to Left. Concave Mirror. Image depends on location of object Object farther than F Real image Upside down and reversed R to L. Concave Mirror.

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Presentation Transcript

### Chapter 30

Mirrors & Lenses

Plain Mirrors
• Virtual Image
• Same size as object
• Equal distance from mirror
• “Flipped” Right to Left
Concave Mirror
• Image depends on location of object
• Object farther than F
• Real image
• Upside down and reversed R to L
Concave Mirror
• Object closer than F
• virtual image
• right side up
• magnified
Convex Mirrors
• Object located anywhere in front of mirror
• Creates a virtual mage
• behind mirror
• right side up
• smaller
Mirror Formula
• f = focal length
• do = object distance
• di = image distance
• 1/f = 1/do + 1/di
• real image has positive image distance
• virtual image has negative image distance
Convex Lenses
• Image depends on location of object
• Real image occurs when object is “far” away
• upside down
• bigger or smaller
Convex Lenses (cont.)
• Object closer than focal length
• Virtual image
• right side up
• larger
• magnifying glass
• corrective lens for far-sighted
Concave Lens
• Virtual Image
• right side up
• smaller
• corrective lens for myopia