S10P1CLec25B

S10P1CLec25B - Physics 1C Lecture 25B"More than 50 years...

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Physics 1C Lecture 25B "More than 50 years ago, Austrian researcher Ivo Kohler gave people goggles thats severely distorted their vision: The lenses turned the world upside down. After several weeks, subjects adjusted--their vision was still tweaked, but their brains were processing the images so they'd appear normal. In fact, when people took the glasses off at the end of the trial, everything seemed to move and distort in the opposite way." --Sunny Bains
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Simple Magnifer Probably the simplest optical system is a single converging lens which is also called a simple magnifer. This will magniFy the image compared to the original object. When the object is placed just in Front oF the Focal point oF a converging lens, the lens Forms a virtual, upright, and enlarged image.
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Simple Magnifer Angular magnifcation is defned as: The angular magnifcation is at a maximum when the image Formed by the lens is at the near point oF the eye (q = -25cm). The thin-lens equation becomes:
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Simple Magnifer Solving For the image distance, p, gives: ±or the max case, the object distance merely depends on F.
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Simple Magnifer The normal eye can Focus on anything placed between the near point and infnity. Since the near point For normal vision is 25cm (For max case): θ o h 25 cm And since the object is at the Focal point: Note in this max case that the angles θ and θ o are small (<20 o ).
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Simple Magnifer Because these angles are so small we can make the small angle approximation: The max magnifcation becomes:
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S10P1CLec25B - Physics 1C Lecture 25B"More than 50 years...

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