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Unformatted text preview: grating produces rainbows of diffracted light. What is the width of the firstorder rainbow when measured with a ruler on a screen 10 m behind the grating? Assume ) ( Sin for 1 . NAME: __________________________________________ Quiz #4d: Phys270 1. [10 pts] A radar station for tracking aircraft broadcasts a 12 GHz microwave beam from a 2.44mdiameter circular radar antenna. From a wave perspective, the antenna is a circular aperture through which the microwaves diffract. What is the diameter of the radar beam at a distance of 40 km? Note that the speed of light is c=3.0 x 10 8 m/s and 1 GHz = 10 9 Hz. Hint: derive the equation first and plug the numbers in at the last step to make the numerical calculation easy!...
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This note was uploaded on 12/26/2011 for the course PHYSICS 270 taught by Professor Drake during the Fall '08 term at Maryland.
 Fall '08
 drake
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