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# LIGHT: OBSERVATIONS .

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Description
LIGHT: OBSERVATIONS. Light propagates in straight lines from a source. Makes triangulation, surveying, star location, etc. possible. REFLECTION. normal. q r. q i. air. q i = q r. glass. Incident ray, reflected ray, normal, lie in a plane. REFRACTION. Light Beam. q i. Air.
Transcripts
Slide 1

﻿LIGHT: OBSERVATIONS Light spreads in straight lines from a source. Makes triangulation, reviewing, star area, and so on conceivable.

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REFLECTION typical q r q i air q i = q r glass Incident beam, reflected beam, ordinary, lie in a plane.

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REFRACTION Light Beam q i Air Water q r q i > q r

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sin q i/sin q r q i/q r 1.33 1.36 1.48 1.68 VARYING q i FOR AIR/WATER q r q i 7.5 22.1 40.6 47.8 10 30 60 80

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INDEX OF REFRACTION For light proliferating amongst air and another straightforward material, n = sin q i/sin q r is the file of refraction of the material The estimation of n relies on upon the material: water: n = 1.33 glass: n = 1.5 diamond: n = 2.4

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TOTAL REFLECTION glass or plastic

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LIGHT PIPES

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INTERSECTING BEAMS When two light bars converge, they don\'t communicate with each other by any stretch of the imagination.

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COLOR

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INTERPRETATION The list of refraction shifts with shading. For Glass: Red: 1.514 Green: 1.520 Violet: 1.529

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x z y POLARIZATION I( q ) = I 0 cos 2 ( q )

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THE RAINBOW 42 0 most extreme return point

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BACKSCATTERING CONE no backscattering From sun backscattering

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q CORNER REFLECTOR q

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CRUDE LENS

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CRUDE LENS

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AIR BUBBLE IN WATER

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NEWTON\'S PARTICLE THEORY OF Light is comprised of little particles. They comply with an indistinguishable laws of material science from different masses like balls and planets. They are little so the particles in two meeting beams don\'t disperse off each other.

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PARTICLE THEORY OF REFRACTION A light molecule profound inside a medium encounters no net constrain. Close to an interface, e.g. amongst air and water, light particles encounter an appealing power towards the water. Could this be the reason for refraction?

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v standard v standard q i v air water q r v water

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NEWTON\'S EXPLANATION OF SNELL\'S LAW sin( q i ) = v standard/v air sin( q r ) = v standard/v water sin( q i )/sin( q r ) = v water/v air

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OTHER PROPERTIES Colors Polarization

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water-filled tube Decisive Test of Particle Theory settled reflect source pivoting mirror air water

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