Procedure
①Arrange the equipment as shown in Figure 6.2. Use
the Slit Extender Arm, two Reflectors, and the Narrow Slit Spacer to construct the double slit. (We
recommend a slit width of about 1.5 cm.) Be precise
with the alignment of the slit and make the setup as
symmetrical as possible.
②Adjust the Transmitter and Receiver for vertical polarization (0°) and adjust the Receiver controls to give
a full-scale reading at the lowest possible amplification.
③Rotate the rotatable Goniometer arm (on which the
Receiver rests) slowly about its axis. Observe the meter readings.
④Reset the Goniometer arm so the Receiver directly faces the Transmitter. Adjust the Receiver
controls to obtain a meter reading of 1.0. Now set the angle to each of the values shown in
Table 6.1. At each setting record the meter reading in the table. (In places where the meter reading changes significantly between angle settings, you may find it useful to investigate the signal
level at intermediate angles.)