If you were to send a beam of laser light to a space station...

Name: Problem 103, Chapter 28: Conceptual Physics
Uploaded: 2019-09-21T00:19:28-08:00
Duration: 1 min 17 s
Channel: Sri Datta Vikas Buchemmavari
Description: If you were to send a beam of laser light to a space station above the atmosphere that appears just above the horizon, would you aim the laser above, below, or at the visible space station? Defend your answer.

If you were to send a beam of laser light to a space station above the atmosphere that appears just above the horizon, would you aim the laser above, below, or at the visible space station? Defend your answer.

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Key Concepts

Atmospheric Refraction

Atmospheric refraction is the bending of light rays as they pass through Earth’s atmosphere, where changes in the air's density cause a variation in the speed of light. This phenomenon leads to the apparent shifting of an object's position in the sky, particularly noticeable when the object is near the horizon. In scenarios such as aiming a laser toward a space station, understanding atmospheric refraction is crucial because the light path is altered, and there is a difference between where the object appears and where it actually is.

Apparent vs. True Position

The apparent position of an object is the location where it seems to be observed from Earth, influenced by atmospheric conditions like refraction, while the true or geometric position is its actual location in space. When targeting an object that has been displaced due to atmospheric refraction, it is necessary to account for this discrepancy by adjusting the aiming point. In the case of a space station seen near the horizon, this means aiming slightly below its apparent position to compensate for the upward bending of light rays.

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