always equal to angle of incidence. Additionally, incident ray, reflected ray and normal all lie in the same
plane.
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normal to surface 0, 0, B₂ refracted ray ©2006 Encyclopaedia Britannica, ino Picture Copyright to Britannica https://www.britannica.com/science/ligh ... refraction n₁ sin 0₁ = n₂ sin 0₂ Where, n, is the refractive index of one medium and 8, is the angle of incidence. Similarly, 1₂ is the refractive index of another medium and 82 is the angle of refraction. dispersion red orange white yellow light colours of the rainbow green blue violet glass prism Picture Copy right to http://www.physics.usyd.edu.au/teach res/hsp/sp/mod31/m31 rays.htm incident ray n₂ reflected ray
When a ray of white light passes through a prism, it is separated into its component colors. This separation of visible light into seven colors is known as dispersion. Procedure: Go to https://phet.colorado.edu/en/simulation/bending-light and open the Bending Light Sim. Click on Intro. Press the red button to turn on laser which passes from one medium to another and learn how you can move the protractor and how to measure incident angles, reflected angles and refracted angles. For each scenario, select the top and bottom material as specified in each data table. Record the index of refraction, n, for each material in the data table. Choose two incident angles between 5° - 85° for each scenario, and record the incident, reflected, and refracted angles in the table. After filing in the table, draw the rays as they are in the sim. The following picture shows the simulation page. Ray O Wieve Material Index of Refraction () 1.00 Www Oas Material w Index of action() 1.33 Www Ge Normal STUDY OF LAW OF REFLECTION OF LIGHT Top Material: Air Top Index of Refraction (n): Bottom Material: Water Bottom Index of Refraction (n):__ 1. Flash the light at certain angle (with certain angle of incidence) so that light gets reflected and bounce back to the same medium with certain angle of reflection. 2. After you complete the predictions, you can observe using the protractor and provide the observed refracted angle.
Incident Angle (0₁) Predicted Reflected Observed Reflected Comments Angle (8₂) Angle(8₂) 3. Draw the ray diagram here for at least two different incident angles. Just focus on the incident ray and reflected ray NOT the refracted ray, we will study law of refraction later on. STUDY OF LAW OF REFRACTION OF LIGHT Top Material: Air Top Index of Refraction (n): Bottom Material: Water Bottom Index of Refraction (n): 1. Flash the light at certain angle so that light gets refracted and passes from one medium to another medium. Do it for 5 different incident angles. Use the equations n, sin 0₁ = 1₂ sin 0₂ Use the equation to predict for 0₂ = sin¹.sin0₁) 2. After you complete the predictions, you can observe using the protractor and provide the observed refracted angle. Trials Observed Incident Angle Predicted (0₁) Comments Reflected Angle Refracted Angle( (0₂) 8₂) 1 Trials 1 back 2345 2345
3. Draw the ray diagram here for at least two different incident angles. STUDY OF LAW OF REFRACTION OF LIGHT Top Material: Air Top Index of Refraction (n): Bottom Material: Glass Bottom Index of Refraction (n):_ 1. Flash the light at certain angle so that light gets refracted and passes from one medium to another medium. Do it for 5 different incident angles. Use the equations n, sin 0₁ = n₂ sin 0₂ Use the equation to predict for 0₂ = sin-¹ (sin 8₂) 2. After you complete the predictions, you can observe using the protractor and provide the observed refracted angle. Trials Observed Comments Incident Angle Predicted (0₁) Reflected Angle Refracted Angle( (0₂) 0₂) 1 2345 4
3. Draw the ray diagram here for at least two different incident angles. STUDY OF LAW OF REFRACTION OF LIGHT Top Material: Water Top Index of Refraction (n): Bottom Index of Refraction (n):__ Bottom Material: Glass 1. Flash the light at certain angle so that light gets refracted and passes from one medium to another medium. Do it for 5 different incident angles. Use the equations n, sin 0₁ = n₂ sin 0₂ Use the equation to predict for 0₂ = sin ¹(sin 0₂) 2. After you complete the predictions, you can observe using the protractor and provide the observed refracted angle. Trials Observed Comments Incident Angle Predicted (0₁) Reflected Angle Refracted Angle( (0₂) 0₂) 1 2345
3. Draw the ray diagram here for at least two different incident angles. Based on your data in the data tables, what patterns do you observe? Write at least three summary statements. Total Internal reflection: Flash the light at certain angle so that light gets refracted and passes from one medium to another medium with refracted angle is 90°. Use the equations ₁ sin 0₁ = n₂ sin 02 Use the equation to predict for 0₁ = sin-¹ (sin 0₂2) When you plug 0₂= 90°, corresponding value for 0₂ is called critical angle. When you increase the incident angle, the ray undergoes total internal reflection. Predict the critical angle for the following condition and check the predicted angle using the simulation. Make sure to provide necessary screen shot here. 1. Glass - water interface (rays pass from Glass to Water) Predicted 8₁ for critical angle = 0c=_ 2. Glass-air interface (rays pass from Glass to air) Predicted , for critical angle = 0c=_ 3. Water to air interface (rays pass from Water to air) Predicted 8, for critical angle = 0. protractor and provide the observed After you complete predictions, you can observe using refracted angle.
Trials Predicted Angle Observed Angle Comments (0c) (8.c) Glass water interface Glass air interface Water to air interface Discussion questions: Is it possible for total internal reflection if light passes from air to Glass, why or why not? Provide answer with reasons: