Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave...
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Transcript of Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave...
![Page 1: Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge,](https://reader035.fdocuments.in/reader035/viewer/2022062407/56649cf95503460f949c9f28/html5/thumbnails/1.jpg)
Convex Mirrors
Virtual Images
![Page 2: Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge,](https://reader035.fdocuments.in/reader035/viewer/2022062407/56649cf95503460f949c9f28/html5/thumbnails/2.jpg)
Review
• For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge, forming a real image
C F
Real, inverted image of the pencil.
![Page 3: Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge,](https://reader035.fdocuments.in/reader035/viewer/2022062407/56649cf95503460f949c9f28/html5/thumbnails/3.jpg)
Review
• An object on F will disapear.
• But if it goes past f it shows up again…
C F
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Virtual Images in Concave Mirrors
• If the object is in front of the focal point, the rays of light diverge after hitting the mirror.
C F
![Page 5: Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge,](https://reader035.fdocuments.in/reader035/viewer/2022062407/56649cf95503460f949c9f28/html5/thumbnails/5.jpg)
Virtual Images in Concave Mirrors
• Note: This arrow lines up with the focal point… Everything else is like before. Almost.
C F
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Virtual Images in Concave Mirrors
• When do the red lines cross? So how do we see a reflection?
C F
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Virtual Images in Concave Mirrors
• Extend the red lines to the OTHER side of the mirror. (Inside the mirror and wall)
C F
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Virtual Images in Concave Mirrors
• This is where you EYE SEES the image:
C F
RealPencil Image
![Page 9: Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge,](https://reader035.fdocuments.in/reader035/viewer/2022062407/56649cf95503460f949c9f28/html5/thumbnails/9.jpg)
Virtual Images in Concave Mirrors
• Since it’s on the OTHER side of the mirror, it’s a VIRTUAL image.
C F
RealPencil Image
![Page 10: Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge,](https://reader035.fdocuments.in/reader035/viewer/2022062407/56649cf95503460f949c9f28/html5/thumbnails/10.jpg)
Real vs Virtual Image
C F
RealPencil
Images on the same side of the mirror as the
object: REAL IMAGES
Images on the other side of the mirror (in the wall):
VIRTUAL IMAGES
![Page 11: Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge,](https://reader035.fdocuments.in/reader035/viewer/2022062407/56649cf95503460f949c9f28/html5/thumbnails/11.jpg)
Convex Mirrors
• Convex Mirrors are also called diverging mirrors. Light rays never intersect once they hit the mirror.
F C
The focal point and center of curvature still exist, they are just on the OTHER side of the mirror now.
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Convex Mirrors
• We can use the same trick as before to make the Laws of Mirrors work.
F C
![Page 13: Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge,](https://reader035.fdocuments.in/reader035/viewer/2022062407/56649cf95503460f949c9f28/html5/thumbnails/13.jpg)
Law #1
• We can use the same trick as before to make the Laws of Mirrors work.
F C
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Law #1
• We can use the same trick as before to make the Laws of Mirrors work.
F C
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Law #2
• Law 2 starts out going toward the focal point.
F C
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Law #2
• Then bounces back parallel. (Remember to use the trick)
F C
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Example
• Let’s put the two together.
F C
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Example
• Law 1:
F C
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Example
• Law 2:
F C
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Example
• Law 2:
F C
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A Note on Focal Points
• For Convex Mirrors, since the focal point is on the opposite side of the mirror from the object, the value given will be negative.
• Example: A focal point of -9 cm indicates the point F is 9 cm from the mirror on the opposite side of the actual object
F
9 cm
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Magnification and Convex Mirrors
• As an object gets farther away from a Convex Mirror, the image gets smaller and smaller.
• As the object gets closer, the object gets nearer to the actual size of the object.
![Page 23: Convex Mirrors Virtual Images. Review For any position where an object is in front of a Concave Mirror past the focal point, the rays of light converge,](https://reader035.fdocuments.in/reader035/viewer/2022062407/56649cf95503460f949c9f28/html5/thumbnails/23.jpg)
Object vs. Virtual Image