# hw11 - homework 11 – LIN KEVIN – Due Apr 6 2008 4:00 am...

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Unformatted text preview: homework 11 – LIN, KEVIN – Due: Apr 6 2008, 4:00 am 1 Question 1, chap -1, sect -1. part 1 of 1 10 points The electric field between the plates of an air capacitor of plate area 1 . 13 m 2 is changing at a rate of 19900 V / m / s. The permitivity of free space is 8 . 85419 × 10 − 12 C 2 / N / m 2 . What is Maxwell’s displacement current? Answer in units of A. Question 2, chap 33, sect 4. part 1 of 1 10 points What is the fundamental source of electro- magnetic radiation? 1. current 2. an accelerating charges 3. none of the above 4. charge 5. voltage Question 3, chap 33, sect 3. part 1 of 1 10 points What is the property of the speed of light in vacuum according to Maxwell’s eqaution? 1. It is greater for radio waves than for visi- ble light. 2. It is a function of the distance from the source. 3. It is greater for visible light than for radio waves. 4. It is independent of frequency. 5. It is a function of the size of the source. Question 4, chap 33, sect 3. part 1 of 1 10 points Gamma-ray bursters are objects in the uni- verse that emit pulses of gamma rays with high energies. The frequency of the most en- ergetic bursts has been measured at around 3 . × 10 21 Hz. The speed of light is 3 × 10 8 m / s. What is the wavelength of these gamma rays? Answer in units of m. Question 5, chap 33, sect 3. part 1 of 2 10 points Consider 3 polarizers #1, #2, and #3 or- dered sequentially. The incident light is un- polarized with intensity I . The intensities after the light passes through the subsequent polarizers are labeled as I 1 , I 2 , and I 3 , respec- tively (see the sketch)....
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## This note was uploaded on 03/03/2011 for the course PHY 303L taught by Professor Turner during the Spring '08 term at University of Texas.

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hw11 - homework 11 – LIN KEVIN – Due Apr 6 2008 4:00 am...

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