c. Access Control.
(1) There should be limited access to the areas where microwave
equipment is in use. Warning signs, identifying potentially harmful microwave devices,
are posted where microwave devices such as radars and communication systems are in
use. See figure 2-6.
(2) Microwave radiation can also be transmitted by the substance it hits.
The radiated energy which comes in contact with the substance passes through without
any loss of energy. If microwave radiation hits a substance which can absorb, the
radiation is absorbed. The radiated energy is neither reflected by the substance nor
transmitted through it. The energy dissipates within the substance.
Figure 2-6. Example--radiation warning sign.