Physics Lab Week 7 Data Sheet

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Jan 9, 2024

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Physics Lab - Week 7 – Data Sheet Case 1 Angle of Incidence (degrees) Angle of Reflection (degrees) Angle of Refraction (degrees) 65 65 43 20 15 10 35 33 23 80 80 46 Which way does the refracted ray bend (toward the normal, away from the normal, neither)? What does that tell us about Medium 1 vs Medium 2? This bending is due to the change in speed as it moves from the less dense air to a more dense water medium. In each scenario the light slows down as it enters the water causing the light ray to bend towards the normal line which is an imaginary line perpendicular to the surface at the point of incidence. Is there a critical angle, or angle which results in total internal reflection? If there is a critical angle, what is its value? You can determine it using both Snell's Law and using the app to play with the angles. The critical angle for light going from water to air is 48.6 degrees. 1

Medium 1 (Water) Index of Refraction = _ 1.33_ ______ Medium 2 (Air) Index of Refraction = __1.0003_ ______ Case 2 Angle of Incidence (degrees) Angle of Reflection (degrees) Angle of Refraction (degrees) 80 80 30 35 46 10 15 20 50 53 Which way does the refracted ray bend (toward the normal, away from the normal, neither)? What does that tell us about Medium 1 vs Medium 2? When light passes from water into air the refracted ray bends away from the normal. This happens because light is moving from a denser water to a less dense air. Is there a critical angle, or angle which results in total internal reflection? If there is a critical angle, what is its value? The critical angle for the water-air boundary is 48.75 2

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