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Mirror Mirage
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===Full Explanation=== When we see an image in a flat (plane) mirror or an outer-shell (convex) mirror, we are looking at a ''Virtual Image''. Virtual images are images that do not exist in a real locations; that is, you cannot put a screen where the image should appear and have the image on the screen. Virtual images are always "within" the mirror, and reflect the direct image of the object in front of them. This is why your mirror image will lift it's left hand if you lift your right, or move it's right foot if you move your left. * With a plane mirror, the image that we see is within the mirror itself. If you do the ray tracing for a plane mirror, you would find that the image is always behind the mirror, and that the light striking the mirror always bounces off at the same angle it struck the mirror at. * With a convex mirror, we see a shrunken image across the mirror's surface. If you do the ray tracing for a convex mirror, you would find that the image appears behind the mirror. This is because the rays from an object in front of a convex mirror will always bounce off the surface angled towards the mirror's focal point, which is ''behind'' the mirror. The Mirror Mirage uses two inner-shell (concave) mirrors to create an image above the hole in the upper mirror. This image is a ''Real Image'', or an image that you could project onto a screen and is visible from outside the mirror. A concave mirror reflects light through its focal point, since it has a focal point ''in front'' of the mirror. However, if the object is sitting within the focal point of a concave mirror, then the mirror will reflect the light rays away from the object. The Mirror Mirage uses a certain type of concave mirror called a ''parabolic'' mirror. Parabolic mirrors reflect all incoming light rays towards their focal point. Any angled light rays that strike them will reflect off in straight lines, parallel to each other. These properties of parabolic mirrors are what create the real image we see. * When incoming light rays bounce off the object inside the mirror mirage, they become angled light rays. * When the angled light rays strike the upper mirror, they bounce off and become straight, or parallel light rays. * When the parallel light rays strike the lower mirror, they bounce off and become angled light rays towards the lower mirror's focal point. * When the angled light rays reach the focal point for the lower mirror, which is above the hole in the top of the upper mirror, they create a real image of the object inside!
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