# 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,

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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, forming a real image CF Real, inverted image of the pencil.

Review An object on F will disapear. But if it goes past f it shows up again… CF

Virtual Images in Concave Mirrors If the object is in front of the focal point, the rays of light diverge after hitting the mirror. CF

Virtual Images in Concave Mirrors Note: This arrow lines up with the focal point… Everything else is like before. Almost. CF

Virtual Images in Concave Mirrors When do the red lines cross? So how do we see a reflection? CF

Virtual Images in Concave Mirrors Extend the red lines to the OTHER side of the mirror. (Inside the mirror and wall) CF

Virtual Images in Concave Mirrors This is where you EYE SEES the image: CF Real Pencil Image

Virtual Images in Concave Mirrors Since it’s on the OTHER side of the mirror, it’s a VIRTUAL image. CF Real Pencil Image

Real vs Virtual Image CF Real Pencil 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

Convex Mirrors Convex Mirrors are also called diverging mirrors. Light rays never intersect once they hit the mirror. FC The focal point and center of curvature still exist, they are just on the OTHER side of the mirror now.

Convex Mirrors We can use the same trick as before to make the Laws of Mirrors work. FC

Law #1 We can use the same trick as before to make the Laws of Mirrors work. FC

Law #1 We can use the same trick as before to make the Laws of Mirrors work. FC

Law #2 Law 2 starts out going toward the focal point. FC

Law #2 Then bounces back parallel. (Remember to use the trick) FC

Example Let’s put the two together. FC

Example Law 1: FC

Example Law 2: FC

Example Law 2: FC

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

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.

Object vs. Virtual Image

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