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How many must be reflected

How many must be reflected

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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58. It has been suggested that spacecraft could be powered by the pressure exerted by sunlight striking a sail. The force exerted on a surface is the momentum p transferred to the surface per second. Assume that photons of 6000 Å light strike the sail perpendicularly. How many must be reflected per second by 1 cm² of surface to produce a pressure of 10-6 atm?
Transcribed Image Text:58. It has been suggested that spacecraft could be powered by the pressure exerted by sunlight striking a sail. The force exerted on a surface is the momentum p transferred to the surface per second. Assume that photons of 6000 Å light strike the sail perpendicularly. How many must be reflected per second by 1 cm² of surface to produce a pressure of 10-6 atm?
Expert Solution
Step 1

Photon flux is to be calculated

Pressure = FORCE/AREA

FORCE = Change in Momentum/ Change in time

Force = 2 x momentum x flux

momentum of photon = h/wavelength of photon

Pressure is given 

10-6 = FORCE /AREA

 

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