he reflection of microwaves by a full reflector (i.e., an aluminum plate) is measured with the setup shown below.
Place the transmitter approximately 15 cm from the reflector at an angle of incidence θ i = 30° (as measured by the protractor on the four-armed base). Vary the angle of the receiver (as measured by the protractor) until the meter reading is a maximum. Record this angle of reflection θ r . Repeat the procedure for angles of incidence of 45° and 60°, measure the corresponding angles of reflection, and check the validity of the law of reflection.