Charles Link's latest activity
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Charles Link reacted to SammyS's post in the thread I Geometry problem of interest with a 3-4-5 triangle with
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Not only is this true for all right triangles, it's true for all triangles in general. -
Charles Link replied to the thread I Geometry problem of interest with a 3-4-5 triangle.Very good. ## x^2+(x+d)^2=(x+2d)^2 ## has two solutions when you solve for ## x ## in terms of ## d ##: ##x=3d ## and ## x=-d ##, with...
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Charles Link reacted to Gavran's post in the thread I Geometry problem of interest with a 3-4-5 triangle with Like.
Just to add that a triangle with sides in the ratio 3:4:5 is the unique right triangle whose sides are in arithmetic progression.
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Charles Link replied to the thread I Energy of Electromagnetic Waves in Destructive Interference.The airy disc is very similar to a single slit diffraction pattern in two dimensions with a circular aperture being very similar to the...
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Charles Link replied to the thread I Is This....Right? Splitting LED colors is not working for me.You really need to use about 3 (converging) lenses: First focus the light onto the slit. Next collimate the light onto the prism by...
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Charles Link replied to the thread I Geometry problem of interest with a 3-4-5 triangle.See my Edits in post 2. I was a little surprised the other day when I computed the tangent of the angle between adjacent sides of the...
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Charles Link reacted to sophiecentaur's post in the thread I Energy of Electromagnetic Waves in Destructive Interference with Like.
What would they 'balance out' to except the total energy? 'Balancing out' implies cancelling out to a zero; that's not what happens...
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Charles Link replied to the thread I Energy of Electromagnetic Waves in Destructive Interference.The energy (total power) incident onto the aperture is the same as the energy (total power) in the diffraction pattern.
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Refer to the original diagram in post #1. Fact: The hanging mass on the left is and remains at rest. This means that the tension in the...
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The scale itself is an elastic coil. You can imagine replacing it with a segment of rope with a different elastic modulus to the rest of...
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So far nobody formalized it, so let it be me. Let me denote the mass on the left as ##m_1## and the mass on the right as ##m_2##. The...
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Just replace string with spring in the argument. If the spring moves freely, it measures 0. If held stationary, it measures the force -...
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My learning is a bit rusty. I can intuit the answer but I can't formalize it. What does the scale read? I say the scale reads 10kg...
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Charles Link replied to the thread B Simple mass/scale puzzle.I'm joining this a little late, but I see one thing that may help explain things that may not have been mentioned previously: These...