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Chapt_34

# Chapt_34 - University Physics(Prof David Flory Chapt_34...

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University Physics (Prof. David Flory) Chapt_34 Monday, August 06, 2007 Name: __________________________ Date: _____________ ___ 1. If the magnetic field in a plane electromagnetic wave is along the y axis and its component is given by B max sin ( kx ω t ), in SI units, then the electric field is along the z axis and its component is given by: A) ( cB max ) cos ( kx ω t ) D) B max cos ( kx ω t ) B) –( cB max / c ) cos ( kx ω t ) E) ( cB max / c ) sin ( kx ω t ) C) –( cB max / c ) sin ( kx ω t ) ___ 2. Which of the following types of electromagnetic radiation travels at the greatest speed in vacuum? A) Radio waves D) Gamma rays B) Visible light E) All of these travel at the same speed C) X rays ___ 3. The Sun is about 1.5 × 10 11 m away. The time for light to travel this distance is about: ___ 4. The order of increasing wavelength for blue (b), green (g), red (r), and yellow (y) light is: A) r, y, g, b B) r, g, y, b C) g, y, b, r D) b, g, y, r E) b, y, g, r ___ 5. If the electric field in a plane electromagnetic wave is along the y axis and its component is given by E max sin ( kx + ω t ), in SI units, then the magnetic field is along the z axis and its component is given by: ___

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Chapt_34 - University Physics(Prof David Flory Chapt_34...

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