Evaluating Solar Photon Flux for Satellite in Low Earth Orbit

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Homework Help Overview

The discussion revolves around evaluating the solar photon flux for a satellite in low Earth orbit, using the solar constant and black body radiation principles. The original poster poses a question about calculating the photon flux based on the distance from the Sun and the solar constant value.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants discuss using the solar constant to derive photon flux, questioning the relationship between energy flux and photon flux. There are attempts to apply Planck's radiation law and numerical integration to find the photon flux over a specified wavelength range. Some participants express uncertainty about the units and the integration process.

Discussion Status

The discussion is ongoing, with various methods being explored to relate energy flux to photon flux. Some participants have suggested integrating over wavelengths and frequencies, while others are clarifying the necessary units and calculations. There is no explicit consensus yet, but productive questions and methods are being shared.

Contextual Notes

Participants note that the assignment is based on lecture notes provided by the professor, and there is a lack of extensive coverage on certain concepts like solid angles. The original poster and others express confusion about the integration process and the expected range of answers.

  • #31
stunner5000pt said:
we could replace h with c/lambda or c/frequency... couldn't we?

Could you justify this for me?


so then the resulting integral is counting hte number of photons... and we don't even need the other integrals?

You won't need the other integrals.
 
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  • #32
couldnt we just write joules as kg m^2 s-2??
what i wrote earlier wasnt correct i was thinkin about the relation between the sped of light lambda and frequency
anyway even if we did like taht then we have a kg factor and kg isn't relevant to a photon
 

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