In legal terms, "clemency" can take various forms. ... It may take the form of a reprieve, which suspends the carrying out of a criminal sentence to allow the offender to seek ways to have the penalty reduced. (Usually this would be in the case of a death penalty sentence.) This would be the example of "a delay in carrying out a sentence." ... It may be commuting a sentence, which leaves the conviction in place but lessens the penalty. So, for instance, a long prison term is commuted to a shorter time in prison. ... It may be the granting of a full pardon. In that case the "legal forgiveness for a crime" description would fit, but not all acts of clemency are pardons.
Nikola Tesla first discovered resonant coupling during his pioneering experiments in wireless power transfer around the turn of the 20th century, but the possibilities of using resonant coupling to increase transmission range has only recently been explored.