Question

As radiation is passed through the electrical field (above), it is observed that this radiation does not change direction as it passes through. predict other properties that this radiation would have.

Answer 1

I would also say it is unaffected by magnetic fields because if it's not affected by electric fields it is not charged. Charged particles interact with both electric and magnetic fields

Answer 2

Gamma radiation would pass straight through an electrical field and not change direction because it has no charge. It would have no mass, high penetrating power and travel at the speed of light. These properties are all indicative of a gamma radiation.