q7_key - is along x and B is along y ii. E is along x and B...

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PHY-2054C-002, Fall 2008 Instructor: Dr. Bhattacharya Quiz #7 KEY , Tuesday, Oct 21 1. An electromagnetic wave of wavelength 500 nm is traveling in vacuum in the - z direction. The electric Feld has amplitude 2 . 40 × 10 - 3 V / m. (a) The frequency of this wave is f = c λ = 3 × 10 8 500 × 10 - 9 = 6 × 10 14 Hz i. 3 × 10 8 Hz ii. 9 × 10 8 Hz iii. 6 × 10 14 Hz (b) The magnetic-Feld amplitude of this wave is B = E/c = 2 . 4 × 10 - 3 3 × 10 8 = 8 × 10 - 12 T i. 8 × 10 - 12 T ii. 3 × 10 - 12 T iii. 7 . 2 × 10 5 T (c) The possible directions of the E and B vectors are (please note that there can be more than one choice) ( Please apply right hand rule and check ) i. E
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Unformatted text preview: is along x and B is along y ii. E is along x and B is along- y iii. E is along y and B is along x iv. E is along- x and B is along y v. E is along- x and B is along- y Useful informations: 1. For a propagating EM wave the electric and magnetic eld vectors E and B and the direction of propagation follow the right hand rule. For example if E is along x and B is along y , then the direction of propagation is along z . 2. c = f E = B c...
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This note was uploaded on 09/21/2009 for the course PHY 2054 taught by Professor Zmudskyy during the Fall '08 term at University of Central Florida.

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