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Provide a definition for your topic. What is a lens? What is reflection and refraction? What is a slide projector?

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Something interesting and accurate.

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A profession that uses this knowledge might be a...

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A profession that uses this knowledge might be a...

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Teacher!

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More than 30 million people where contact lenses

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Refraction is the bending of light as it passes from one substance to another

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Light gathering the device of a camera typically containing a group of a compound lenses

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People that work at a movie theater.

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A proffession that uses this knowledge might be a...

Parent!!!!!

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Used in movie theaters,🎭,24 slides 📽 a second

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Can turn your picture upside down.  🙃(:

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A piece of equipment used for displaying photographic slides on a screen

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Reflection and refraction. Light rays change direction when they reflect off a surface, move from one transparent medium into another, or travel through a medium whose composition is continuously changing.

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Family or friends can use it for entertainment.

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FACT

As a result, the ray bends inside the glass, i.e., the refracted ray lies in a direction closer to the normal (the perpendicular to the boundary of the media) than does the incident ray. A light ray entering a different medium is called the incident ray; after bending, the ray is called the refracted ray.

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If the surface is smooth and flat, the light will bounce off it at equal angles. That is why a flat mirror reflects a good likeness of the object being reflected. ... Notice the angles at which the rays of light strike the surfaces. Refraction occurs because light bends.

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Kael’s picture with labels

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Slide projectors were common in the 1950s and 1960s as a form of entertainment; family members and friends would gather to view slideshows.

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The slide projector 📽 was created by,  Frenchman Auguste,  Louis
Lumiere.