PHYS 102 1st Edition Lecture 24Outline of Last Lecture I. IntensityII. Solving for IntensityOutline of Current Lecture III. Solving for WavelengthCurrent LectureIII. Solving for Wavelength A. Problem 49 L = ¼ , = v/f where, v = c = 3 X 108 m/s in vacuum air (speed of light on all EM waves in air/ vacuum) = 3 X 108/ 75 = 4,000,000 meters L = ¼ = (1/4)(4,000,000) = 1,000,000 meters = ~700 miles B. May be on the exam Laser pointer that emits light: f = 4.5 X 10-14 Hz B = 6.0 X 10-4 TA) Find = = c/f = 3 X 108/ 4.5 X 10-14=6.7 X 10-7 m (Red) B) Find amplitude of B field oscillation? C = E/B These 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.E = CB = 8 X 108 X 6 X 10-4 = 4.8 X 105
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