An ac voltage source has an rms voltage of 120 V. Its voltage goes from zero to its maximum positive value in 4.20 ms. Write an expression for the voltage as a function of time.
Answer to relevant QuestionsIf glass is dispersive, why don’t we normally see a spectrum of colors when sunlight passes through a glass window? Explain. (Are the speeds of each color of light the same in the glass?) The index of refraction in a certain precious transparent stone is 2.35. What is the speed of light in that stone? What is the critical angle of a diamond in water? A person looks over the edge of a pool and sees a bottle cap on the bottom directly below, where the depth is 3.2 m. How far below the water surface does the bottle cap appear to be? A 45o – 90o – 45o prism (Fig. 22.27) is made of a material with an index of refraction of 1.85. Can the prism be used to deflect a beam of light by 90o. (a) In air? (b) What about in water?
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