Final answer:
The minimum size candle that must be used to provide enough light to observe people at exterior doors of storage rooms and structures containing arms or Category I or II A&E can be determined using the inverse square law. By considering the distance between the observer and the doors, as well as the required luminous intensity, we can calculate the minimum Candle Power required. A candle with a luminous intensity of at least 1 candela would suffice in this scenario.
Step-by-step explanation:
In order to provide enough light to observe people at exterior doors of storage rooms and structures containing arms or Category I or II A&E, the minimum size candle can be determined by considering the distance between the observer and the doors, as well as the luminous intensity of the candle. The luminous intensity is typically measured in candelas (cd) and represents the amount of light emitted by a light source in a particular direction. To calculate the minimum size candle, we can use the inverse square law, which states that the intensity of light decreases as the square of the distance from the source increases.
Let's say the observer is 10 meters away from the doors. We can assume a minimum luminous intensity required for observation, let's say 100 candelas (cd). Using the inverse square law, we can set up the following equation:
Luminous Intensity / (Distance^2) = Candle Power
Plugging in the values, we have: 100 cd / (10^2) = Candle Power
Simplifying this equation, we find that the minimum Candle Power required is 1 candle. Therefore, a candle with a luminous intensity of at least 1 candela would be sufficient to observe people at the exterior doors of the storage rooms and structures containing arms or Category I or II A&E.