Category: Research

  • Waves

    Waves

    Optics Series Lecture, Lecture – XII and – XIII “Traveling waves, Differential wave equations, Particle and wave velocities.” In one of our earlier optics session lecture I had hinted at having waves defined by their pulse shape called as wave profile — or alternatively wave shape or wave form, and transcribing them into forms that…

  • Fresnel’s Bi-prism; measurement of wavelength of light

    Fresnel’s Bi-prism; measurement of wavelength of light

    Optics Series Lecture, Lecture – XI “Fresnel’s Bi-prism: measurement of wavelength of light by it.” Today we will discuss another interesting interference set-up, now that we have discussed the Young’s double slit experiment, in lecture – IX. A few words about the general mechanism behind interference. There are two kinds of interference basically that we…

  • Electromagnetic Nature of Light — A brief history of light.

    Electromagnetic Nature of Light — A brief history of light.

    Let us begin this lecture which has roughly two parts; 1. the history of light and its understanding through the centuries and 2. the electromagnetic nature of light A brief history of light Various optical devices and optical phenomena have been known since close to 4000 years. The optical devices of ancient time includes mirrors, burning…

  • Spherical harmonic waves

    Spherical harmonic waves

    In our lecture — VIII, we worked out the form of plane harmonic traveling waves. Note that soon we will have to a. address the concept of wave profile and b. how to convert a wave profile into its corresponding time-dependent or traveling form. But before we do that here is yet another general form of…

  • Young’s double slit experiment

    Young’s double slit experiment

    Optics Series Lecture, Lecture – IX. “Young’s Double Slit Experiment. Coherent Sources and Conditions of Interference” This lecture was delivered on 14th February in a lecture session of 1 and 1/2 hours. This lecture was delivered to Physics elective students. At a later date this was delivered as a lecture to honors students as well. The…