Why are black holes invisible?

1 Answer

When very huge mass is compressed into a very small ,volume we get black hole..HUge means very much larger 10 solar mass,enter image source here


THe surface gravity of black hole is so high that object with the highest speed t can not escape from its surface..THat means light with 300,000 KM/second can not escape from the black hole..So we can not see it.. WE see objects with its own light or reflected light. picture slideplayer.com.