Gleb1964's latest activity
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GGleb1964 reacted to Drakkith's post in the thread Undergrad Can somebody explain this: Planck's Law in action with
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If you're suggesting that the plasma inside a reactor is emitting the same amount of radiation as a solid blackbody at the same... -
GGleb1964 replied to the thread Undergrad Can somebody explain this: Planck's Law in action.Planck’s radiation law applies to an ideal Black Body, where electromagnetic waves are absorbed and re-emitted multiple times within the...
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GGleb1964 replied to the thread Undergrad How do I stretch a laser from a beam into a sheet?.There are standard optical components used for generating lines from laser beams, known as Powell lenses. These lenses are manufactured...
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GGleb1964 reacted to gary350's post in the thread I need a concave mirror with a focal length of 150 feet with
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This works. -
GGleb1964 reacted to gary350's post in the thread I need a concave mirror with a focal length of 150 feet with
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I need to cut down a 3 year old dead tree from top down so tree causes no damage with small pieces falling. I need a mirror with a... -
GWhen the treadmill runs at constant speed, the only difference is air resistance. Just analyse the treadmill from the inertial frame...
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GGleb1964 reacted to jbriggs444's post in the thread Work done running on an inclined treadmill with
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Sorry, you are wrong in this case. The force of the feet on the treadmill is not irrelevant. -
GGleb1964 reacted to jbriggs444's post in the thread Work done running on an inclined treadmill with
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Completely irrelevant. The work that is not done raising your body is done moving the treadmill belt downward. Exactly the same net... -
GGleb1964 replied to the thread Undergrad Can somebody explain this: Planck's Law in action.It’s not the volume itself that matters, but the relationship between the volume size and the photon’s mean free path. That’s what I’m...
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GGleb1964 replied to the thread Undergrad Can somebody explain this: Planck's Law in action.What do you think the emissivity coefficient would be if the mean free path of photons (e.g., gamma photons) is much greater than the...
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GGleb1964 replied to the thread Undergrad Can somebody explain this: Planck's Law in action.The absolute values of irradiance on your graph is applicable only to a enough large volume of plasma which absorb as a Black Body...
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GGleb1964 replied to the thread Undergrad Why use Stefan's Law to measure temperature?.For example, FLIR: Infrared Camera Accuracy and Uncertainty in Plain Language Infrared cameras are typically calibrated using multiple...
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GGleb1964 reacted to Charles Link's post in the thread Undergrad Why use Stefan's Law to measure temperature? with
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In that case, one would need additional spectral detail, such as measuring with two or more bands. -
GGleb1964 replied to the thread Undergrad Why use Stefan's Law to measure temperature?.It's quite simple: if the source's angular size is below the resolution limit, it becomes diluted into the point spread function. If the...
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GGleb1964 replied to the thread Undergrad Why use Stefan's Law to measure temperature?.It is impossible to use Stefan's law for unresolved source.


