What is the name for an instrument for sending messages using reflected light from a moveable mirror?
Telegraphy continued to use American Morse code internally, requiring translation operators skilled in both codes for international messages. A heliograph is a telegraph that transmits messages by flashing sunlight with a moveable mirror, usually using Morse code. The idea for a telegraph of this type was first proposed as a modification of surveying equipment (Gauss, 1821). Various uses of mirrors were made for communication in the following years, mostly for military purposes, but the first device to become widely used was a heliograph with a moveable mirror (Mance, 1869). The system was used by the French during the Siege of Paris
Mirror for a Hero Mirror for a Hero Mirror for a Hero () is a 1988 Soviet science fiction film directed by Vladimir Khotinenko based on the short story of the same name by Stanislav Rybas. Metropolitan psychologist-linguist Sergei Pshenichny (Sergei Koltakov) soon after quarreling with his father (Felix Stepun) on ideological grounds, meets with former mining engineer Andrei Nemchinov (Ivan Bortnik) at a rock concert, who recently returned from prison. After the concert, Sergei and Andrei, passing through the city park, see that a film shooting is taking place, about the post-war time. To get a better look at what is happening on