10/13/2023 0 Comments Jello gelatin![]() ![]() Notice how, as you do so, the beam bends towards the center of the dish. Now, starting from the laser's original position, slide the laser in a straight line to the right and then the left, so that the beam moves toward the outer edges of the dish. Holding the green laser parallel against the tabletop, shine the laser through the middle of the curved edge of the dish (it should look as though the laser is bisecting the circle). Next, take the round Petri dish of blue gelatin. Use the protractor to measure the angle of incidence between the beam and a line perpendicular to the flat edge, and the angle of refraction after it enters the gelatin. ![]() As you do so, notice how the beam bends towards the center of the dish. Now rotate the laser so that the beam hits the flat edge of the dish at an angle. (Use the red laser for the red gelatin use either the green or red laser for the clear gelatin.) Start with the beam perpendicular to the edge notice that it passes through the gelatin in a straight line. Hold the laser parallel to the table and shine it through one side of a square dish of red or clear gelatin. Shine the green laser through the red jello and notice that the beam gets dimmer as soon as it enters the jello. Shine the green laser through the round dish of blue jello and observe the beam as it travels through the jello. Notice that you can see the beam very clearly Shine the laser through the dish of clear gelatin. Notice that the beam gets dimmer almost as soon as it hits the gelatin. Then shine the laser through the blue gelatin. Shine the laser through the middle of the round dish of red gelatin-a beautifully visible beam travels through it.
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