2 Using the same equipment setup as in experiment 1,put the paper between the glass plate and the special component carrier on paper between the glass plate and the special component carrier on the angular translator.The magnetic surface will hold the glass plate and paper in place.The millimeter scale should run horizontally. 3Adjust the position of the special component carrier until the back surface of the glass plate coincides with the perpendicularly scored line on the table. With the glass plate sitting perpendicular to the bench,adjust the position of the aperture mask so that one vertical edge of the image on the paper lines up with the scored line on the table which is parallel to the bench.If the glass does not alter the light's path,the vertical edge which was centered should remain centered although the translator's table is rotated. 5 Rotate the table and record what happens to the previously centered edge.Is the incident ray refracted toward or away form the normal to the glass?Figure 2.1 shows how to calculate the index of refraction given the angle of rotation and the edge displacement of the image. NOTE:Using this method,a small error is introduced since we are not certain that the light very near to the image's edge was exactly perpendicular to the glass plate in the beginning (Why?).Hence the measured value of 0 (as in the figure)is not accurate.The methods under Part II give more accurate results. incident beam n'=index of glass n=index of air(≈l) tan o'-4 n'-nsin sine glass plate =sin sine' Flgure 2.1:Calculating the Index of Refraction 6Replace the glass plate with the acrylic plate and determine the index of refraction for acrylic. PartⅡ：Alternate Methods DRemove the paper from between the glass plate and component carrier.With the glass place perpendicular to the bench,put the viewing screen directly behind the plate and adjust the aperture mask to center the image on the screen.Rotate the table to a convenient angle.Light is refracted toward the normal when passing from air to glass.Is the same true when Light propagates from glass to air,By observing the position of the image on the viewing screen,you 2727 ② Using the same equipment setup as in experiment 1, put the paper between the glass plate and the special component carrier on paper between the glass plate and the special component carrier on the angular translator. The magnetic surface will hold the glass plate and paper in place. The millimeter scale should run horizontally. ③ Adjust the position of the special component carrier until the back surface of the glass plate coincides with the perpendicularly scored line on the table. ④ With the glass plate sitting perpendicular to the bench, adjust the position of the aperture mask so that one vertical edge of the image on the paper lines up with the scored line on the table which is parallel to the bench. If the glass does not alter the light's path, the vertical edge which was centered should remain centered although the translator's table is rotated. ⑤ Rotate the table and record what happens to the previously centered edge. Is the incident ray refracted toward or away form the normal to the glass? Figure 2.1 shows how to calculate the index of refraction given the angle of rotation and the edge displacement of the image. ★NOTE: Using this method, a small error is introduced since we are not certain that the light very near to the image's edge was exactly perpendicular to the glass plate in the beginning (Why?). Hence the measured value of θ (as in the figure) is not accurate. The methods under Part Ⅱ give more accurate results. ⑥ Replace the glass plate with the acrylic plate and determine the index of refraction for acrylic. Part Ⅱ:Alternate Methods ①Remove the paper from between the glass plate and component carrier. With the glass place perpendicular to the bench, put the viewing screen directly behind the plate and adjust the aperture mask to center the image on the screen. Rotate the table to a convenient angle. Light is refracted toward the normal when passing from air to glass. Is the same true when Light propagates from glass to air, By observing the position of the image on the viewing screen, you