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production theory 2 > week 7 > Flashcards

week 7 Flashcards

1
Q

Three properties of light

A

Wavelength
frequency
intensity

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2
Q

Light has both blank and blank properties

A

Electric and magnetic

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3
Q

light travels in ____

A

waves

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4
Q

What is the difference between light waves and audio or ocean waves

A

light waves move in different direction

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5
Q

What are four types of EMR wavelength that are safe

A

Radio, microwaves, IR, visible

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6
Q

What are three dangerous EMR waves

A

UV, x-ray, gamma

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7
Q

when light waves encounter objects what four things can they do

A

Reflect, absorb, pass through, refract

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8
Q

When light waves in counter objects what happens

A

Multiple colours of light encounter objects and appear as white light

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9
Q

White light is made up of a whole bunch of different___

A

Wavelengths of light

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10
Q

What is chromatic aberration

A

When all the various wavelengths aren’t bent exactly the same

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11
Q

What do we call it when various wavelengths are not bent exactly the same

A

Chromatic aberration

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12
Q

What is the wavelength of light in nanometers

A

From 400 to 700 nanometers

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13
Q

The frequency of visible light is called what

A

Colour

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14
Q

What is the range of visible light/color in hertz (Hz)

A

430 trillion hertz to 750 trillion hertz

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15
Q

What colour can be seen at 430, trillion Hz

A

red

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16
Q

What colour can be seen at 750 trillion Hz

A

violet

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17
Q

what are footcandles

A

1 foot candle is the amount of light on a 1 inch square surface

Created from a source of light that is 1 foot away from the source

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18
Q

How many foot candles is full unobstructed sunlight

A

10,000 foot candles

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19
Q

How many foot candles are cloudy days

A

Around 100 foot candles

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20
Q

What is Lux

A

Lux is the amount of light being generated at a defined distance

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21
Q

What is the formula for converting lux to foot candles

A

10.76 Lux = 1 foot candle

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22
Q

What are two ways to measure light

A

Lux and foot candles

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23
Q

What are two tools used to measure light

A

Reflective meter

and incident meter

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24
Q

What is a reflective metre

A

Measures how much light as being reflected back into the metre

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25
What is an incident metre
How much light is hitting the surface of the metre
26
What is the acronym for qualifying light
D I S C
27
What does disc stand for
Direction, intensity, softness, colour
28
How do I tell which direction the light is coming from
Observed through the shadow
29
How do you define intensity of light
Relationship between source and ambient light level It changes based on the proximity of the light to the source If one light exhibit more intensity than others this is understood through an increase in perceived contrast
30
How is softness defined
By the shadow the light creates By the size of the light source relative to the subject being illuminated
31
What is a hard shadow versus a soft shadow
A hard shadow is a well defined a soft shadow lesser defined edges
32
How is the colour of a light measured
Degrees kelvin
33
What are 4 degrees kelvin colours to know
Tungsten halogen Household fluorescent Noon sunlight LCD monitor
34
From yellow to blue which order do the 4 kelvin colours go in
yellowest: tungsten blue-whiteish: household fluorescent pale blue: noon sunlight bluest: LCD monitor
35
What are contrast ratio’s
Relationship between the key light and fill light
36
How are contrast ratio is measured
The doubling of light
37
What is fill light
How many times brighter
38
Three elements of power
Amperage Voltage Wattage
39
What is amperage/amps
How much power is flowing
40
What is voltage/volts
The pressure/intensity at which the power is flowing
41
What is wattage/watts
Energy created or energy required
42
How many amps is the average circuit
15 amps
43
One amp Powers how many watts
1 amp powers 100 Watts
44
What are four elements of tungsten lights
They have black body radiators They draw high energy They get hot around 3200 Kelvin They are dimmable
45
What are five properties of fluorescent lights
gas mixture ignited and controlled by ballast Different colour temperatures They draw low energy The output softer light They are non-dimmable
46
Five properties of HMI lights
- hydrargydum - Gas mixture ignited and controlled by a ballast - Daylight colour temperature - Draws low energy - emits UV light
47
What are five properties of LED lights
Light emitting diode’s Range of temperature and colours Very low energy Many small point sources Often dimmable
48
Which two types of light have a gas mixture ignited and controlled by ballast
HMI and fluorescent
49
Which lights get very hot
Tungsten
50
Which lights are non-dimmable
Fluorescent
51
Which three lights dry low energy
Fluorescent HMI and LED
52
Which type of light draws the lowest energy
LED lights
53
What are two light locations of Frenzel
Flood and spot
54
What is the difference between Flood in Spot in a Fresnel light
Flood is when the lightbulb is close to the lens Spot is when the lightbulb is far away from the lens
55
What is the wattage range of a frensel light
100 W to 50,000 W
56
What are barn doors
Used to control the area of illumination
57
What will narrowing the barn doors do
Result in a narrower shaft of light
58
What are three elements of a broad light
Very soft Hard to control Barn doors have no effect
59
what is an ellipsoidal also known as
A pattern projector
60
What are cyc or strip lights
Designed to cast light down or up cyclorama walls
61
What will black bouncers or reflectors do
Add depth and shadows Block unwanted light and reflections
62
What will white bouncers and reflectors do
Soften and reflect light Will not change the colour temperature
63
What will silver bouncers and reflectors do
Reflect light Add contrast or sharp highlights
64
What will gold bouncers and reflectors do
Add a hint of warmth Subtle contrast by reflecting light
65
What are three lighting modifiers
Silk flag net
66
What will silk light modifiers do
Defuse and soften light
67
What will flag modifiers do
Block/cut light
68
What will NET modifiers do
Reduce intensity
69
What does DMX stand for
Digital Multiplex
70
What do you DMX digital multiplex lights do
Controlled via a lighting board or an app Allows you to adjust lighting from the ground

production theory 2 (4 decks)

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