Gleb1964's latest activity
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GGleb1964 replied to the thread High School Question about the color of a thin film.You need look to Haidinger fringes, fringes of equal inclination, formed with extended monochromatic source passing though the equal...
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GGleb1964 replied to the thread Undergrad How do I stretch a laser from a beam into a sheet?.A Powell lens typically requires fine alignment in one direction, while it is insensitive to perpendicular displacements. We typically...
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GGleb1964 reacted to PAllen's post in the thread High School Thought Experiment: Behavior of shadow of object moving at speed c with
Like.
If you make the distant light source a flash bulb (at rest in screen frame), the fixes simultaneity. Then, you will definitely see a... -
GGleb1964 reacted to Drakkith's post in the thread Undergrad Can somebody explain this: Planck's Law in action with Like.
If you're suggesting that the plasma inside a reactor is emitting the same amount of radiation as a solid blackbody at the same...
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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
Skeptical.
This works. -
GGleb1964 reacted to gary350's post in the thread I need a concave mirror with a focal length of 150 feet with
Haha.
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... -
GGleb1964 reacted to A.T.'s post in the thread Undergrad Work done running on an inclined treadmill with Like.
When 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 Undergrad Work done running on an inclined treadmill with Like.
Sorry, you are wrong in this case. The force of the feet on the treadmill is not irrelevant.
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GGleb1964 reacted to jbriggs444's post in the thread Undergrad Work done running on an inclined treadmill with Like.
Completely irrelevant. The work that is not done raising your body is done moving the treadmill belt downward. Exactly the same net...
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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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