Question

what is negative rays ?

Answer 1

Negative interest on excess reserves is an instrument of unconventional monetary policy applied by central banks to encourage lending by making it costly for commercial banks to hold their excess reserves at central banks so they will lend more readily to the private sector

Answer 2

Cathode rays are so named because they are emitted by the negative electrode, or cathode, in a vacuum tube. Since the electrons have a negative charge, they are repelled by the negative cathode and attracted to the positive anode.