Pasco OS-8523 SLIT ACCESSORY Manuel d'utilisateur télécharger pdf (Page 9)

Slit Accessory 012-05880D

Setup

➀

Set up the laser at one end of the optics bench and place the Single Slit Disk in its holder

about 3 cm in front of the laser. See Figure 1.2.

➁ Cover the screen with a sheet of paper and attach it to the other end of the bench so that the

paper faces the laser.

➂ Select the 0.04 mm slit by rotating the slit disk until the 0.04 mm slit is centered in the slit

holder. Adjust the position of the laser beam from left-to-right and up-and-down until the

beam is centered on the slit.

Figure 1.2: Optics Bench Setup

Procedure

➀ Determine the distance from the slit to the screen. Note that the slit is actually offset from the

center line of the slit holder. Record the screen position, slit position, and the difference

between these (the slit-to-screen distance) in Table 1.1.

➁ Turn off the room lights and mark the positions of the minima in the diffraction pattern on

the screen.

➂ Turn on the room lights and measure the distance between the first order (m = 1) marks and

record this distance in Table 1.1. Also measure the distance between the second order (m =

2) marks and record in Table 1.1.

laser

screen

slit

Table 1.1: Data and Results for the 0.04 mm Single Slit

Slit-to-screen distance (D) = _____________________________

First Order (m=1) Second Order (m=2)

Distance between

side orders

Distance from center

to side (y)

Calculated slit width

% difference

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 19 20

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Pasco OS-8523 SLIT ACCESSORY Manuel d'utilisateur Page 9