![]() What is Brewster law?īrewster’s law, relationship for light waves stating that the maximum polarization (vibration in one plane only) of a ray of light may be achieved by letting the ray fall on a surface of a transparent medium in such a way that the refracted ray makes an angle of 90° with the reflected ray. One photon of visible light contains about 10-19 Joules (not much!) the number of photons per second in a beam. The energy of a single photon is: hν or = (h/2π)ω where h is Planck’s constant: 6.626 x 10-34 Joule-sec. This means that as the distance from a light source increases, the intensity of light is equal to a value multiplied by 1/d2. The intensity of light is inversely proportional to the square of the distance. How do you calculate light intensity given power and distance? The transmitted light is polarized along the axis of the polarizer. When polarized light of intensity I0 is incident on a polarizer, the transmitted intensity is given by I = I0cos2θ, where θ is the angle between the polarization direction of the incident light and the axis of the filter. How do you find the intensity of light transmission? Therefore, the transmitted intensity is 500 W / m2. What is the intensity of the light transmitted by the first polarizer? When unpolarized light passes through a polarizer, the intensity is cut in half. ![]() (a) Unpolarized light, with an intensity of 1000 W/m2 is incident on the first polarizer. If it passes again through any other polaroids, then its intensity given by Malus law is, I = I 2 cos 2 θ What is the intensity of the light in W m2 after it passes through the first polarizer? ![]() We know, an unpolarized light passes through a polaroid its intensity becomes half of its initial intensity. 24 Why sin is used in Snell’s law? What is Malus law formula? ![]()
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