Joule - A term in the international system for a unit of electrical, mechanical, and thermal energy equal to the work done when a current of one ampere is passed through a resistance of one ohm for one second. Used . . Surge protectors are often given joule ratings, but this rating refers only to the amount of energy they can absorb, not what gets through. Its value was calculated originally by James Pr. Used . escott Joule, but the term was first introduced by Dr. Mayer of Heilbronn....
Smoke Machine - A Smoke Machine or Fogger is an electrical device that creates clouds of artificual and hopefully non-toxic fog. The fog may come in different colors or smells and may be water or mineral based. It i. Used . s used for effects in theatre, staging, concerts and clubs.
Hazers by contrast create a more diffusive, expansive haze that is usually not a thick and is used to enhance other ef. Used . fects, such as lighting and light beams.
Fog - A fogger is a device that emits a dense vapor that appears similar to fog or smoke,
usually by the vaporization of a water and glycol based or glycerine based fluid. A hazer or diffusion fogger. Used . is used to produce an atmospheric haze, rather than clouds of smoke, and is used by many lighting designers to reveal airborne light beams, especially lazers. . Used . ...
Zoom Ellipsoidal - A type of profile spot with two lenses allowing the adjustment of both the size of the beam and whether it is a hard or soft focus. This adjustment of focal length makes for an instrument with many us. Used . es around the stage. The flexibility is also vital when working with gobos. Also known (in the US) as a Zoom Ellipsoidal.. Used . ...
Amphitheatre - The name amphitheatre (alternatively amphitheater) is given to a public building of the Classical period (being particularly associated with ancient Rome) which was used for spectator sports, games an. Used . d displays.
Apart from function, the important outward distinction between an amphitheatre and a theatre is that an amphitheatre is round or oval in shape (whereas a classical th. Used . eatre was semi-circular). However, an amphitheatre differs from a circus, which was used for racing and looked more like a very long, narrow horse shoe.
The best-known amphitheatre in the world is...