Which of the following cannot be determined for the material inside a black hole?

Question

Quizplus · Accepted Answer

The extreme gravity inside a black hole is so strong that it does not allow any material or radiation to escape from it, not even light. Therefore, it is impossible to determine the chemical composition of the material inside a black hole. However, the mass, electric charge, and angular momentum of the black hole can be determined through its effects on surrounding matter and radiation.

Which of the Following Cannot Be Determined for the Material