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Order of experiment’s performance

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1. Install all devices on the optical bench, as shown in Figure 3.12.

2. Turn on the light source, adjust the height of all devices so that the light beam will pass through the all devices and will fall on the photocell.

3. Turn off the light source, connect the photocell circuit and record electrical current of photocell i0. Weak photocurrent i0 caused by exposure to a photocell extraneous light sources in the room.

4. Install the Limbo of analyzer to zero division. Turn on the light source S.

Smoothly rotate the polarizer to achieve the maximum deflection of the microammeter im. Here, obviously, the plane of polarization of the polarizer and analyzer are parallel to each other, i.e. the angle between them is zero.

5. No more changing the position of the polarizer, rotate the analyzer in the range of 0° to 360°, recording every 15° angle θ and a corresponding photocurrent i in column 2 of Table 3.1.

6. Repeat step 5 two times, write the value of the photocurrent i in columns 3 and 4 of Table 3.1.
Table 3.1 – Checking the law of Malus

θ град i 1 mA i 2 mA i 3 mA mA cosa cos2a
               
               
               
…              
               

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |

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