Recent content by Carusun

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    Optical Physics; Light Entering an Atmosphere

    Many thanks! Got the answer now :) I knew that integrating was involved, I just couldn't make that last leap :D
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    How Does the Focal Length of a Lens Vary with Red and Green Light?

    I can't remember the exact equation, but I do recall that the refractive index, n, of an object is inversely proportional to the wavelength (i.e. as the wavelength decreases, the amount the light is refracted by increases). Have you been given any more information then that that you've given...
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    Optical Physics; Light Entering an Atmosphere

    [SOLVED] Optical Physics; Light Entering an Atmosphere Homework Statement Quoted word for word from the question sheet: A light ray enters the atmosphere of a planet and descends vertically 20.0 km to the surface. The index of refraction where the light enters the atmosphere is 1.000, and it...
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    Specific Internal Energy of a diatomic gas

    That's great, thanks! I had actually gone through this question the first time just assuming it was a monatomic gas, then kicking myself when I remembered H was diatomic. Now, at least, I have a reason to do so, and am now kicking myself again... Many thanks! :biggrin:
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    Specific Internal Energy of a diatomic gas

    Hi all, I'm stuck on a question, and I'm hoping you guys can help... Anyway, here it is: A J-shock in a Herbig-Haro object is propagating through neutral hydrogen gas at speed 100 kms-1. The gas has number density 107 m-3 and temperature 104 K. (d) The internal energy per unit mass of a...
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    Interstellar Medium: Herbig-Haro Objects

    Well, I believe that I've done that question now, and I've ploughed ahead to one of the later parts of the question. e) The cooling rate per unit volume in the post shock gas can be represented as, L=(LAMBDA) n(1)^2, where (lambda) is a cooling function dependent on the cooling process...
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    Interstellar Medium: Herbig-Haro Objects

    Hi all. First post and all that, so I hope I don't do anything wrong, and that if I do, you'll cut me a little slack :P Anyway, onto the question I'm wanting help with: A J-shock in a Herbig-Haro object is propagating through neutral hydrogen gas at speed 100km/s. The gas has number...
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