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How many nanoseconds does it take light to travel 1.00 ft in vacuum? (This result is a

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How many nanoseconds does it take light to travel 1.00 ft in vacuum? (This result is a useful quantity to remember.)
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IDENTIFY We know the speed of light in ms tdv Co...View the full answer


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Pinky Debnath
Teaching has always been my passion. I started working very early on. I got my first job even before completing my vocational Diploma. I got an opportunity to visit around globe in the initial 1st year of my career. Since, i was always inclined towards interacting with people of different cultural background , attitude and belief. Hence, I started teaching with Institutions and various Universities as guest lecturer. Then came a time for polishing up and updating my skills, where i chose psychology to pursue in long run. As psychology has a part of "talk therapy" , it matched with my urge to continue. Learning indeed shapes your future.
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University Physics with Modern Physics

University Physics with Modern Physics

ISBN: 978-0321501219

12th Edition

Authors: Hugh D. Young, Roger A. Freedman, Lewis Ford

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Using a few basic physics principles, you can impress your friends with a trick that makes a bottle disappear. For this experiment, you will need a mini plastic bottle, glycerin, a glass, and a funnel. First, open the bottle and pour some glycerin into it, then close the bottle tightly. Next, pour some water into the glass using a funnel. Place the mini bottle into the glass of water and it will look normal. This is because light travels through air faster than it travels through the glass and water, allowing our eyes to see the bottle inside the glass. However, when you fill the mini bottle with more glycerin, and pour glycerin into the glass, then put the glycerin filled bottle into the glass with glycerin in it. Half of the bottle that is submerged in the glycerin will become invisible as the light travels through glass and glycerin at the same speed, thus it does not bend and no refraction takes place, making the bottle invisible. This happens because both glass and glycerin have almost the same refractive index, which causes the speed of light to be the same in both mediums, causing no bending of light and making the bottle disappear.

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