Lasers and velocities Lasers are used to accurately measure velocities of objects. Laser light produces an oscillating electromagnetic field E with a constant frequency f that can be described by E = E, cos (2nft). If a laser beam is pointed at an object moving toward the laser, light will be reflected toward the laser at a slightly higher frequency, in much the same way as a train whistle sounds higher when it is moving toward you. If Af is this change in frequency and v is the object's velocity, then the equation 2fv Af = can be used to determine v, where c = 186,000 mi/sec is the velocity of the light. Approximate the velocity v of an object if Af = 10% and f = 1014.

Lasers and velocities Lasers are used to accurately measure velocities of objects. Laser light produces an oscillating electromagnetic field E with a constant frequency f that can be described by E = E, cos (2nft). If a laser beam is pointed at an object moving toward the laser, light will be reflected toward the laser at a slightly higher frequency, in much the same way as a train whistle sounds higher when it is moving toward you. If Af is this change in frequency and v is the object's velocity, then the equation 2fv Af = can be used to determine v, where c = 186,000 mi/sec is the velocity of the light. Approximate the velocity v of an object if Af = 10% and f = 1014.

Algebra and Trigonometry (6th Edition)

6th Edition

ISBN:9780134463216

Author:Robert F. Blitzer

Publisher:Robert F. Blitzer

ChapterP: Prerequisites: Fundamental Concepts Of Algebra

Section: Chapter Questions

Problem 1MCCP: In Exercises 1-25, simplify the given expression or perform the indicated operation (and simplify,...

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Question

Lasers and velocities Lasers are used to accurately measure
velocities of objects. Laser light produces an oscillating
electromagnetic field E with a constant frequency f that can
be described by
E = E, cos (2nft).
If a laser beam is pointed at an object moving toward the laser,
light will be reflected toward the laser at a slightly higher
frequency, in much the same way as a train whistle sounds
higher when it is moving toward you. If Af is this change
in frequency and v is the object's velocity, then the equation
2fv
Af =
can be used to determine v, where c = 186,000 mi/sec is
the velocity of the light. Approximate the velocity v of an
object if Af = 10% and f = 1014.

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