012-02744K Istroductory Optics Systen Experiment 5: Reversibility Equipment Need
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012-02744K Istroductory Optics Systen Experiment 5: Reversibility Equipment Needed: -Optics Bench -Ray Table and Base Slit Plate Cylindrical Lens -Light Source -Component Holder Slit Mask Siit Mask Inciderce, Slit Plate Figure 5.1 Equipment Setup Introduction In Experiment 4, you determined the relationship that exists between the angle of incidence and the Internal Angle angle of refraction for light passing from air into aof Incidence more optically dense medium (the Cylindrical Lens). An important question remains. Does the same relationship hold between the angles of incidence and refraction for light passing out of a more optically dense medium back into air? That is to say, if the light is traveling in the opposite direction, is the law of refraction the same or different? In this experiment, you will find the answer to this question. Angle of Refraction Procedure Set up the equipment as shown in Figure 5.1 Adjust the components so a single ray of light passes directly through the center of the Ray Table Degree Scale. Align the flat surface of the Cylin- drical Lens with the line labeled "Component". With the lens properly aligned, the radial lines extending from the center of the Degree Scale will all be perpendicular to the circular surface of the lens. Figure 5.2 Internal Angle of Incidence Without disturbing the alignment of the lens, rotate the Ray Table and set the angle of incidence to the values listed in Table 5.1 on the following page. Enter the corresponding angles of Refraction in the table in two columns: Refraction, and Incidence, (Let Incidence, Refraction,). 15 1:/.?????. ®Explanation / Answer
Does the principle of optical reversibility hold for reflection as well as refraction? Explain.
optical reversibility means that if a light passes through a medium with refractive index n and if the light hits the medium at a certain angle theta which is the angle of incidence the light refracts and comes out at a different angle than the angle of incidence.We noticed that the light reflects partially for an angle of incidence and reflected ray also makes the same angle with the normal as the angle of incidence .Hence principle of optical reversibility holds for reflection and refraction.
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