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# q8_key - m 2 has an electric Feld of amplitude E then a...

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PHY-2054C-002, Fall 2008 Instructor: Dr. Bhattacharya Quiz #8 KEY , Tuesday, Oct 28 1. Light having a certain frequency, wavelength, and speed is traveling through empty space. If the frequency of this light were doubled, then (a) its wavelength would remain the same, but its speed would double. (b) its wavelength would remain the same, but its speed would be halved. (c) its wavelength would be halved, but its speed would double. (d) its wavelength would be halved, but its speed would remain the same . (e) both its speed and its wavelength would be doubled. 2. If a sinusoidal electromagnetic wave with intensity 14.0 W
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Unformatted text preview: / m 2 has an electric Feld of amplitude E, then a 28.0 W / m 2 wave of the same wavelength will have an electric Feld of amplitude (a) 4E (b) 2 √ 2E. (c) 2E. (d) √ 2E . 3. A light beam has a wavelength of 380 nm in a material of refractive index 2.00. In a material of refractive index 3.00, its wavelength will be (a) 760 nm. (b) 380 nm. (c) 190 nm. (d) 253 nm . (e) 127 nm. Useful informations: 1. c = fλ v = f λ 2. refractive index in medium n = velocity of light in vacuum velocity of light in the medium = c v...
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