Category: action principle
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Fermat’s Principle, a lecture in optics
Optics series lecture, Lecture-III “Geometrical Optics and Fermat’s Principle”. Geometric Optics: When the size of objects that a wave of light interacts with are large compared to the wavelength of light λ, λ can be neglected for practical purposes and the light waves behave like rays of light. Rays of light are geometric line segments…
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Blackholes and the Action Principle.
This is not an article that purports to establish any link between what I have to say about Blackholes and what I have to say about Action Principle. First off there are always a connection between action principle and anything else in Physics. Everything in principle can be derived from the action principle. The action…
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Optical Path and Fermat’s Principle.
Mirror and Fermat’s principle: We can see ourselves in the mirror and take our mirror reflected selfie as a consequence of Fermat’s Principle, the topic of discussion of the blog. … Snell’s Law governs refraction which is adjustment of optical paths in in-homogeneous media because light can no more travel at its speed in free-space.…
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Why is energy conserved?
Here is the way; that hasn’t been changed in a long time. We, start with a simple object, and we note that, such an object is defined for its motion by whats called, its location in space = x, or, the increments in its location, which is called, an infinitesimal distance = dx, the instantaneous time…
M Dash Foundation: C Cube Learning 