# Light and Geometric Optics

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Light and Geometric Optics Refraction of Light through Different Media Mr. Sampson SNC2D1-03 Date performed: September 29th, 2011 Date due: October 4th , 2011 Purpose: The purpose of this lab is to find out the angles light goes through different objects, at different angles. Hypothesis: I predict that the angles will be very different, when light is shined through the different angles. I expect this because the objects are different materials and the light will go through them in a different way. Materials: * Water * Vegetable oil * Coordinate paper * Acrylic semicircular * Ray box with single slit * Semicircular plastic dish * Dish detergent for cleaning Procedure: 1. The dish for the water was placed at the center of the coordinate paper with the flat edge along the 90° - 270° line and the 0° line intersecting the center of curvature. That line acted as the Normal line. 2. Water was placed inside the dish. 3. A single ray of light was projected at the centre of the semicircular dish at than angle of incidence of 0° (along the normal) 4. The angle of refraction was measured, and the results were recorded in the table. 5. Steps 3 and 4 were repeated for the following angles: 10°, 20°, 30°, 40°, 50°, and 60° 6. The angle of the refracted ray was always measured with respect to the normal. 7. Steps 1-6 were repeated using the vegetable oil and the acrylic block. 8. The lab bench was cleaned and all materials were returned to the lab cart. Observations: Observations Table Angle of incidence in air | 0 ˚ | 10 ˚ | 20 ˚ | 30 ˚ | 40 ˚ | 50 ˚ | 60 ˚ | Angle of refraction in water | 0 ˚ | 8 ˚ | 15 ˚ | 23 ˚ | 32 ˚ | 37 ˚ | 43 ˚ | N=sin Θi sin ΘRFor water. | 0 | 1.25 | 1.32 | 1.28 | 1.21 | 1.27 | 1.27 | Angle of refraction for veg. oil | 0 ˚ |