Final answer:
The magnitude of the electric field far away from the depletion region is smaller compared to that in the space charge region due to the way electric fields behave between unlike charges.
Step-by-step explanation:
The magnitude of the electric field far away from the depletion region is small compared to that in the space charge region. This can be proven by considering the behavior of the electric field due to two unlike charges. The electric field is stronger between the charges because their fields add up in the same direction. However, at large distances, the fields of the individual charges are in opposite directions and subtract, resulting in a weaker combined field. At very large distances, the field of the two unlike charges becomes similar to a smaller single charge.