Sunlight above the Earth's atmosphere has an intensity of 1.35 kW/m2. If this is reflected straight back from a mirror that has only a small recoil, the light's momentum is exactly reversed, giving the mirror twice the incident momentum. (a) Calculate the force per square meter of mirror (in N/m2). (b) Very low mass mirrors can be constructed in the near
Sunlight above the Earth's atmosphere has an intensity of 1.35 kW/m2. If this is reflected straight back from a mirror that has only a small recoil, the light's momentum is exactly reversed, giving the mirror twice the incident momentum. (a) Calculate the force per square meter of mirror (in N/m2). (b) Very low mass mirrors can be constructed in the near
Principles of Physics: A Calculus-Based Text
5th Edition
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Raymond A. Serway, John W. Jewett
Chapter9: Relativity
Section: Chapter Questions
Problem 58P
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Sunlight above the Earth's atmosphere has an intensity of 1.35 kW/m2. If this is reflected straight back from a mirror that has only a small recoil, the light's momentum is exactly reversed, giving the mirror twice the incident momentum.
(a) Calculate the force per square meter of mirror (in N/m2).
(b) Very low mass mirrors can be constructed in the near weightlessness of space, and attached to a spaceship to sail it. Once done, the average mass per square meter of the spaceship is 0.109 kg. Find the acceleration (in m/s2) of the spaceship if all other forces are balanced.
(c) How fast (in m/s) is it moving 24 hours later? (Assume the spaceship started from rest.)
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