Category: light
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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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Primary aberration, a lecture in optics.
Lecture-II; delivered on 27-1-2017 In our Lecture-I we discussed the phenomena of aberrations that arise because of a discrepancy of a first order theory and the 3rd order theory as depicted by the Maclaurin series; where we saw that first order theory represents the so called paraxial optical systems. Please have a look of the linked…
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Aberrations, a lecture in optics.
Optics series Lecture — I Optical Aberrations delivered on 24 – 1 – 2017 — all optics series lectures can be accessed here. This lecture has been delivered in one of the honors class that I am teaching this semester. You will do really well to read the linked article on Optical path and Fermat’s principle…
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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.…
M Dash Foundation: C Cube Learning 