# Beam Box Investigations For Reflection - Refraction and Total Internal Reflection

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﻿Beam Box Investigations For Reflection - Refraction and Total Internal Reflection Created for CVCA Physics By Dick Heckathorn 1 June 2K + 5

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#1 #2 30 o 30 o 60 o 60 o #3 Rays 1-2-3

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Conclusion The edges are measured from the typical. The edge of rate equivalents the point of reflection.

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Reflection r N i

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Conclusion The points are measured from the typical. The point of rate equivalents the edge of refraction. The episode beam, reflected beam and the ordinary all lie in a similar plane.

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Extend reflected beams behind reflect Locate reflection surface of reflect on line. Reflect beam of light from reflect as appeared. Embed a stick (1) on reflected light beam. Draw a line from protest picture Mark and draw the light beams on paper Insert stick into cardboard as appeared. Expel reflect The picture is found where the beams cross. Draw a line crosswise over focal point of paper Repeat for beams 3 and 4. Embed stick (2) on beam and draw it. Mirror a second beam from reflect as indicated Repeat for other three events How is this line arranged with respect to reflect line? How does length of red and purple line think about? Draw typical lines and analyze edge "i" and "r" Image Mirror i r Pin 2 4 3 1

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Conclusion The picture is dependably as a long ways behind the reflecting surface (reflect) as the question is in front. The line associating the picture and protest is opposite to the reflecting surface (reflect).

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Locate question. Rehash for eye 2, 3, and 4 Draw line speaking to reflect. Associate eye (1) and picture Draw line from protest reflect Light voyages this way from question stick Note point "i" approaches edge "r" Then attract line from reflect to eye 1 Locate picture Locate eye (1) Why know where the picture is? Picture Mirror surface r i Object Pin 3 1 4 2

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Conclusion Locating the picture permits one to anticipate the way light will fly out from the protest some area.

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I 1,2 I 1 Mirror (1) I 2 Object Mirror (2)

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Mirror (1) Mirror (2) I 1,2 I 2 I 1 Object

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Periscope I 1 Object I 1,2

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Pepper Ghost Bottle of Water 90 o Plexiglas Candle

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Peppers Ghost

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T29-1B

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T29-1B

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T29-1B

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#19 V P.A. F All beams parallel to P.A. reflect back through "F"

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Parabolic Mirror #20

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Circular Mirror P.A. Not all beams parallel to P.A. reflect back through "F"

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Circular Mirror P.A.

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Go to bended reflect PowerPoint. Click

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N #4 i r Measure edge i and edge r. Both = 0 o

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#5 N 30 0 i r 19.5 0 Calculate Measure edge i and point r.

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N #6 60 0 i r 35.3 0 Calculate Measure edge i and point r.

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for both edges, Using what esteem did you get? It ought to be close to 1.50 is known as the file of refraction (n P ) of the plastic.

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N Quiz 75 0 40.1 0 Calculate the edge of refraction. Draw an episode beam of 75 o . Test your drawing with a light beam. Draw the refracted beam.

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N #7

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N Calculate point of refraction Use light beam to check. Twisted away/toward ordinary? Draw the refracted beam 30.9 0 30.9 0 20 0 #8

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n 1 sin θ 1 = n 2 sin θ 2 It lets us know which way the refracted beam twists. Does it all!!! What does it do? How? The greater "n" has the littler 'sin θ " and along these lines the littler " θ " (edge).

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N Bent away/toward typical? Ascertain edge of refraction Draw the refracted beam Use light beam to check. 74.6 0 74.6 0 40 0 #9

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N Bent away/toward typical? Utilize light beam to check. Presently what do we do? Figure edge of refraction Tilt!! 60 0 60 0 #10

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N What happens here? 75 0 75 0 #11

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N

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Demonstrations T.I.R. Plastic T.I.R. Water T.I.R. Glass Tube Ball in/out of Water Mugs

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Demo – Aquarium Balls Aquarium Balls Air Water

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30 0 #12 Draw the refracted beam. Compute edge of refraction Which way is beam bowed? n=1.50 19.5 0 Check with beam box. Ascertain point of refraction Which way is beam twisted? Draw the refracted beam. 30 0

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#13 60 0 60 0 Calculate point of refraction Calculate edge of refraction n=1.50

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11.8 0 18.2 0 28 0 17.8 0 #15 11.8 0 18.2 0 28 0 17.8 0 #14 n=1.50 Calculate edge of refraction Calculate edge of refraction Calculate edge of refraction Calculate edge of refraction

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#18

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That's All Folks!! No 16-17