PHYS 101 1st Edition Lecture 29Outline of Last Lecture I. Snell’s Law Continued…II. Practice ProblemsOutline of Current Lecture III. Recap of Equations on Exam IV. Practice Exam ProblemsCurrent Lecture III. Recap of Equations on Exam A. Chapter 22 n1 sin 1 = n2 sin 2n = c/vChapter 21 Distance = speed X time = c/f in vac/air = v/f in medium E = hf P = I = P/A ; where A is 4r2Lesson 22.6 will not be on the exam. IV. Practice Exam ProblemsA. #2 Air - icen1 sin 1 = n2 sin 2These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.1 sin(30) = 1.31 sin(2) 2 = 22.4Ice-water3: angle of refraction in water n1 sin 1 = n2 sin 2nice sin (22.4) = nwater sin 31.31 sin(22.4) = 1.333 sin 3 3 = 22.0#4 a) = c/f = (3 X 108)/(6 X 1014) = 500 nm b) n = c/vin glass 1.5 = 3 X 108 / V V = 2 X 108 m/s ; this is 2/3 of c Frequency does not change. in glass = vin glass/fin glass = (2 X 108)/(6 X 1014) = 333 nm #6 n1 sin 1 = n2 sin 21 sin = 1.7 sin (30) =
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