# Which persons glasses will be useful in starting a

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Unformatted text preview: ll see herself in focus? A. 14 cm B. 28 cm C. 56 cm θr θi d d The image is formed an equal distance BEHIND the mirror Therefore, if you stand a distance = ½ of your near point, the distance to the image will be the near point distance. Physics 212 Lecture 28, Slide 20 Physics 212 Lecture 28, Slide Far­sighted Converging Lens creates virtual image at person’s near point Physics 212 Lecture 28, Slide 21 Physics 212 Lecture 28, Slide Near­sighted Fix with diverging lens that creates virtual image at far point. Physics 212 Lecture 28, Slide 22 Physics 212 Lecture 28, Slide Checkpoint 1 Two people who wear glasses are camping. One of them is nearsighted and the other is farsighted. Which person’s glasses will be useful in starting a fire with the sun’s rays? A. The farsighted person’s glasses B. The nearsighted person’s glasses “My glasses have never started a fire and I am nearsighted. That has to count for My something. Also, magnifying glasses seem like it would be closer to a farsighted person's glasses and tv characters are always using them” person's “...you'd let a nearsighted guy without his glasses on attempt to start a fire?. ” Physics 212 Lecture 28, Slide 23 Physics 212 Lecture 28, Slide Checkpoint 1 Two people who wear glasses are camping. One of them is nearsighted and the other is farsighted. Which person’s glasses will be useful in starting a fire with the sun’s rays? A. The farsighted person’s glasses B. The nearsighted person’s glasses Farsighted = Converging Lens Only Converging Lens can produce a REAL IMAGE !! Physics 212 Lecture 28, Slide 24 Physics 212 Lecture 28, Slide The Large Synoptic Survey Telescope Physics 212 Lecture 28, Slide 25 Physics 212 Lecture 28, Slide How to make a big telescope mirror Melt it &amp; spin it 52,000 lbs of borosilicate g...
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