T0C13:

If the averaging time for exposure is 6 minutes, how much power density is permitted if the signal is present for 3 minutes and absent for 3 minutes rather than being present for the entire 6 minutes?

  1. 3 times as much
  2. 1/2 as much
  3. 2 times as much
  4. There is no adjustment allowed for shorter exposure times
T0C01 T0C02 T0C03 T0C04 T0C05 T0C06 T0C07 T0C08 T0C09 T0C10 T0C11 T0C12 T0C13