Subelement Q: SAFETY— Topic 99: Radiation Exposure
Question 3-99Q3
Element 3 (GROL)RF exposure from portable radio transceivers may be harmful to the eyes because:
Explanation
RF exposure from portable radio transceivers can be harmful to the eyes because RF energy absorbed by the eye tissues can cause heating. The lens of the eye is particularly susceptible to heat damage due to its limited blood supply, which makes it inefficient at dissipating heat. Prolonged or intense heating can denature the proteins in the lens, leading to clouding, a condition known as cataracts. This is why FCC regulations establish RF exposure limits to prevent excessive localized heating.
Option A is incorrect as typical RF magnetic fields do not directly cause vision blur. Option B is incorrect; RF heating causes physical damage, not polarization of the lens. Option C is incorrect; the magnetic fields from portable radios are far too weak to attract metal particles.
Related Questions
3-99Q1 Compliance with MPE, or Maximum Permissible Exposure to RF levels (as defined in FCC Part 1, OET Bulletin 65) for “controlled” environments, are averaged over _______ minutes, while “uncontrolled” RF environments are averaged over ______ minutes.3-99Q2 Sites having multiple transmitting antennas must include antennas with more than _______% of the maximum permissible power density exposure limit when evaluating RF site exposure.3-99Q4 At what aggregate power level is an MPE (Maximum Permissible Exposure) study required?3-99Q5 Why must you never look directly into a fiber optic cable?3-99Q6 If the MPE (Maximum Permissible Exposure) power is present, how often must the personnel accessing the affected area be trained and certified?