Term
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Definition
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Term
| What does the iris of your eye do? |
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Definition
| Opens and closes to regulate light entry |
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Term
| What is the fovea centralis? |
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Definition
| A small depression near the center of the retina, constituting the area of most acute vision. |
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Term
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Definition
-120 million – have to work in bundles, but can be triggered by one photon of light (smallest particle of light)
-Low Light Vision – Scotopic Vision
-498nm |
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Term
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Definition
-7 million
-Three Types
*Red/Short – 564nm
*Green/Medium – 534nm
*Blue/long – 420nm
•Color and Detail
-Normal Light – Photopic Vision |
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Term
| Why don’t we see the blind spot in our visual field? |
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Definition
| Because of the optic disk where the optic nerve is attached to the eyeball. The path the optic nerve takes to the brain prevents us from perceiving this spot created by the optic disk. |
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Term
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Definition
| Cone cells are responsible for all of our color and detail vision and function only in good illumination. |
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Term
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Definition
| Rods function under much lower light levels and provide lower resolution and only allow us to determine shades of black and white. Low Light Vision. |
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Term
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Definition
| You can actually see a shift from photopic to scotopic vision as well as a change in the visual acuity of color by taking a red, a blue and a green object outside as the light shifts from day to night, this is the transition vision. |
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Term
| How many colors can the human eye perceive? |
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Definition
| The human eye can perceive 16.7 million different colors. |
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Term
| What is the visible spectrum? |
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Definition
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Term
| What color do humans see best in low light levels? |
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Definition
| We see blue much better in low light levels than any other color due to the wavelength response of the different photoreceptors. |
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Term
| Who developed the modern system of classifying color? |
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Definition
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Term
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Definition
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Term
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Definition
| This is quite simply how light or dark a hue is from white to black. |
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Term
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Definition
The Strength of the hue.
Like value, chroma is referenced to the grey scale, but rather than looking at the relationship of the hue to black and white it looks at how close to grey the hue is. |
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Term
| What are the primary colors of light? |
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Definition
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Term
| What are the secondary colors of light? |
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Definition
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Term
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Definition
| Using multiple sources with colors that can be blended to create other colors. |
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Term
| What is subtractive color? |
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Definition
| The color mixing system is subtractive; wavelengths are removed to create other colors. |
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Term
| What are the color filters used in lighting? |
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Definition
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Term
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Definition
| Rosco, Lee, GAM and Apollo |
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Term
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Definition
| Gels work by absorbing certain wavelengths of light while allowing others to pass through. |
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Term
| What is a dichroic filter? |
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Definition
| Moving light color filters are made of glass with a chemical coating applied. |
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Term
| How does a dichroic filter work? |
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Definition
| These filters reflect unwanted wavelengths and stand up well to high heat. Dichroic filters allow for more saturated colors and colors that are more consistent from batch to batch. Mainly used in permanent installs. |
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Term
| What is does the transmission value of a filter mean? |
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Definition
| The transmission value is the percentage of light that will pass through the gel. |
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Term
| What are the warm colors? |
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Definition
| Hues from red through yellow; hues associated with daylight and sunset |
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Term
| What do warm colors represent? |
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Definition
| Warm colors tend to evoke feelings of comfort, anger, excitement or warmth. |
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Term
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Definition
| Hues from blue-violet through blue-green; hues associated with night and overcast days. |
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Term
| What does a cool color represent? |
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Definition
| Cool colors are associated with calmness, sadness, isolation and rest. |
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Term
| What is photopigment depletion? |
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Definition
| Loss of color vision due to over exposure to that color. |
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Term
| How do you prevent photopigment depletion? |
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Definition
| Add breaks of complimentary colors to the stage to keep the primary color you are using fresh in the audiences’ minds and eyes. |
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Term
| Why is color so important to a show? |
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Definition
| It helps reinforce the concept of a piece, it evokes feelings, it influences moods and emotions, it represents time and place, it recreates nature and it is used for effects. |
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Term
| What is a problem with using too many colors on a stage? |
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Definition
| Remember that white light is comprised of all colors, so if you put multiple colors on stage at the same time you run the risk of mixing to white. |
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Term
| Why is experimenting important? |
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Definition
| Color can’t be learned in a classroom, you have to experiment with it to see what color will do to different pigments and skin tones. |
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