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Measuring Refractive Index a thin alit illuminated by light of frequency f produces its first dark band

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Measuring Refractive Index a thin alit illuminated by light of frequency f produces its first dark band at ± 38.2° in air. When the entire apparatus (alit, screen, and space in between) is immersed in an unknown transparent liquid, the slit's first dark bands occur instead at ± 17.4°. Find the refractive index of the liquid.
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IDENTIFY and SET UP sine2a locates the first dark band In the liquid the wave...View the full answer


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Related Book For  book-img-for-question
College Physics

College Physics

ISBN: 978-0321601834

7th edition

Authors: Jerry D. Wilson, Anthony J. Buffa, Bo Lou

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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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