Physics 6C Ch23worksheet Solutions (1)

Physics 6C Ch23worksheet Solutions (1) - PHYSICS 6C Ch.23...

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PHYSICS 6C Ch.23 Worksheet clas.ucsb.edu/staff/vince/ 1) The distance between the Earth and the Sun is 1.50·10 11 m. How long does it take for light to cover this distance? 2) Consider a simple plane electromagnetic wave that is traveling vertically downward with its electric field pointing southward. Which direction does the magnetic field of this wave point at this instant? a) North b) East c) West d) Upward 3) There are two categories of ultraviolet light. Ultraviolet A (UVA) has a wavelength ranging from 320nm to 400nm. It is not so harmful to the skin and is necessary for the production of vitamin D. UVB, with a wavelength range between 280nm and 320nm, is much more dangerous, because it causes skin cancer. Find the frequency ranges of UVA and UVB. Use the formula c= λ f. UVA: 7.5·10 14 Hz 9.4·10 14 Hz UVB: 9.4·10 14 Hz 1.1·10 15 Hz 4) On a sunny day, the average intensity of sunligh t on Earth’s surface is about 1x10 3 W/m 2 . a) Find the average radiation pressure due to the sunlight.
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This note was uploaded on 09/09/2011 for the course PHYSICS 6c taught by Professor Staff during the Spring '11 term at UCSB.

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Physics 6C Ch23worksheet Solutions (1) - PHYSICS 6C Ch.23...

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