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97 Cards in this Set
- Front
- Back
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What is an atom?
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The smallest particle of a substance
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What is an electron shell?
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An orbit that can hold a set number of eletrons
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What is an amp?
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The measurement of electrical current
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What is potential?
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The capacity of an electrial system
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What is a volt?
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The unit measurement of potential
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What is an ohm?
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The measurement of resistance
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What is a load in an electrical circuit?
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Converts electrical energy to light,heat or mechanical energy
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What are three types of connectors used on lighting fixtures?
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Edison connector, twist lock and stage pen
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What is the typical wiring of an edison connector?
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Hot gold, neutral silver and ground green
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What are 4 properties of light that influence the way we perceive an object?
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Intencity, colour, sharpness and angle
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What are the properties of a wave?
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Defraction, reflection and refraction
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What does refraction mean?
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Waves change direction as they pass from one medium to another
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What is the point of incidence?
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When light strikes the surface
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What is the angle of refletion?
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The angle between normal and a reflected light ray
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What does a diffuse reflector do?
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Spreads light over a large area
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Name three types of reflectors commonly used in lighting fixtures?
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Elipsoidal, Spherical, Parabolic
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What is the speed of light?
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186, 200 miles/second in a vacuum
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What does ERS stand for?
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Elliposodal Reflector Spotlight
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What is the part of the optic train where the gobos and shutters are placed called?
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The gate
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What type of reflector is used in a Fresnel fixture?
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A spherical reflector
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What is a Fresnel commonly used for?
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Wash lights
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What type of lamp is used in a Par Can?
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Wash lights
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What is a scoop use for?
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Work lights on larger washes
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What is the voltage from neutral to hot in a single phase system?
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120v
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How many wires in a single phase system?
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4 wires
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What is the voltage across hot legs in a three phase system?
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208v
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How many wires in a three phase system?
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5
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What do circuit breakers do?
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Prevent circuit damage during a fault condition
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What are the standard gauges of feeder cable?
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2-0 and 4-0
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What are the standard rack configurations?
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12,24,48,96
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What does 96x2.4k mean?
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96 Dimmers rated at 240w
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How many colors can the human eye perceive?
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16.7 million
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What is photopigment depletion?
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Drains Color receptors
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What is color temeperature
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measures the whiteness of a color
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What is the color temperature of a conventional lighting fixture?
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3200k
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What does CTB filter do?
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Boosts the apparent color temperature of a source
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What can amber shift be a probelm?
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Gels can change color as a fixture dims
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What is throw distance?
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the distance from a light to the person
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If you put a gel into a fixture, how do you determine the footcandle of the fixture?
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Multiply the footcandles by the correction factor
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How would you figure out how many fixtures you would need to light a stage?
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Divide the stage demensions by the beam diameter and multiply together
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what are on lighting pipes called?
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Electrics
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What are the two types of vertical lighting positions?
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Booms and Tail downs
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How are the lighting fixtures on a boom numbered?
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From top to bottom
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What are types oof accessories can be included with a lighting fixture on a plot?
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Gobo, Scrollers, Barn doors
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After all fixtures are on the light plot, what do you have to add?
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Fixture Information
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What is drafting Paper called
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Vellum
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What two types of pencils can be used in a draft?
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Mechanical Pencils and Lead holders
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What type of of fixtures are memory boards designed to operate?
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Conventional
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What types of lights are moving light consoles designed to operate?
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Moving Lights
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How many cues can be stored in the express 24/48?
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600
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How many pages and how many submasters per page on the express 24/48?
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10 pages and 24 submasters
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What is a captured channel?
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One that is in a look that you dont have level control over
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How do you record a cue on the express?
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"Record" "cue" "number" "enter"
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Where do you set up a chase on the express?
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Blind mode
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If you are not using all 512 channels of dmx do you need to send all 512 channels of information?
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No
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Why shouldnt DMX be used to control pyro?
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Constantly refreshing
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How is a Hi signal generated?
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Highs are sent where (+)at a high potential than the (-)wire
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What is a DMX universe
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Control 512 channels of information
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WHat is the most important peice of gear for good DMX data transmission?
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The cable
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Define Form?
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How light reveals an Object
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Define Color
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The visable spectrum
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Define Distribution
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The placement of light and shadow on stage
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Define Movement
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Change in color,Intensity and Direction
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What is McCandles theory of Lighting
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Two front lights offset 45 Degree angle, one warm, one cool, One back light at 45 degrees
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Why would we use back light or down light?
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Separate the person from the background
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What is a key light
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Primary light source
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Other than front, back,and down, what are two other angles of light you might use on stage?
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Floor, sides and high sides
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What is the first thing you should do to prepare for a design
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Become familiar with the material
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What is a cue list?
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A list of cues placements and basic lighting looks
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How is a dimmer hook up organized
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by dimmer number
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Why would you place cues in the script?
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So you can get an idea where cues should happen
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What is a corporate event
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Anual meeting, Product launches, Fund raisers
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What is the best way to light a podium?
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3 point lighting
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What is a problem with back lighting a podium?
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Glare on the telepromter
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What elements of the production might need to be light?
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Lecturn, scenery,Dimemrs, Shows and break out rooms
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What are the parts of a camera?
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Lens, Apeture,CCD,View finder
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What does CCD stand for?
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Charged coupled device
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What part of the eye i sthe ccd comarable to?
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The reitna
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What type of light would you want to use for a key light?
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ERS,Fresnel in a spot mode, a par
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What type of fixture would make a good fill light?
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Fresnel in flood mode
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Why do you need to white balence a camera?
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Telling the camera what to use as white
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What is contrast ratio?
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Difference between light and dark areas
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How does an LED work?
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Electrons move between the conductor plates
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How does neon work?
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High Voltage causes gas in a tube
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What are fiber optic
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Thin strands of glass used to transmitt light
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How do fiber optics work?
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Light is reflected inside a thin glass fiber
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How is laser created?
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Excited atoms release photons
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What is an Arbor?
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Holds counter weight
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What is the purpose of the fire curtain?
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Keep the fire from entering the audience
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What is one requirement of a fall arest system?
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Must be continous
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What are two types of fall arrest systems?
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Active and Passive
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What does a lanyard do?
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Slows down your desent in case of fall
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How does the fall arrest system attach to the truss
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at the motor clips
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What is a vertical brace?
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a small vertical tube that runs from the top of the chord to the bottom chord
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What is the end plate?
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How the truss is connected together
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What is a Gaussett Connector?
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A simple connector between truss peices
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What are three safe types of loads on a truss?
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Point, Distrubuted, 3 point
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