Podcast
Questions and Answers
What seven colors make up white light?
What seven colors make up white light?
- Red, orange, yellow, green, blue, black, white
- Red, orange, lavender, green, blue, indigo, violet
- Red, orange, yellow, green, blue, indigo, violet (correct)
- Red, pink, yellow, green, blue, indigo, violet
A red filter allows all colors of light to pass through.
A red filter allows all colors of light to pass through.
False (B)
What occurs when white light passes through a green filter?
What occurs when white light passes through a green filter?
Only green light passes through, and all other colors are absorbed.
When light passes through a red filter after going through a green filter, ____ light will pass through.
When light passes through a red filter after going through a green filter, ____ light will pass through.
Match the filters with their corresponding transmitted light:
Match the filters with their corresponding transmitted light:
Which of the following is NOT one of the primary colours of light?
Which of the following is NOT one of the primary colours of light?
When red and blue light are combined, they produce cyan.
When red and blue light are combined, they produce cyan.
What three primary colours of light can be combined to create white light?
What three primary colours of light can be combined to create white light?
The colours created by adding red and green light is __________.
The colours created by adding red and green light is __________.
How many different colours can most people perceive on screens?
How many different colours can most people perceive on screens?
Coloured filters allow only light of their own color to pass through while absorbing all other colors.
Coloured filters allow only light of their own color to pass through while absorbing all other colors.
Match the following combinations of primary colours with the resulting colours:
Match the following combinations of primary colours with the resulting colours:
What visual technology combines red, green, and blue light to produce images on screens?
What visual technology combines red, green, and blue light to produce images on screens?
Flashcards
Subtraction of light
Subtraction of light
The process of removing specific colors from white light, resulting in a different color.
Color filter
Color filter
A material that allows only certain colors of light to pass through, while absorbing the rest.
Transmitted light
Transmitted light
The color that remains after a color filter removes others from white light.
Absorbed light
Absorbed light
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Combining color filters
Combining color filters
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Primary Colors of Light
Primary Colors of Light
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Yellow Light
Yellow Light
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Magenta Light
Magenta Light
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Cyan Light
Cyan Light
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White Light
White Light
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Filter (Light)
Filter (Light)
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Subtracting Colors of Light
Subtracting Colors of Light
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Maximum number of colors that most people can see
Maximum number of colors that most people can see
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Study Notes
Primary Colors of Light
- Light has three primary colors: red, green, and blue
- These colors cannot be created by mixing other colors
- Combining these primary colors creates other colors
Combining Primary Colors of Light
- Red + Green = Yellow
- Red + Blue = Magenta
- Blue + Green = Cyan
- Red + Green + Blue = White
Color Production in Displays
- Computer screens, TVs, and smartphones use red, green, and blue light (RGB) to create a wide spectrum of colors, reflecting human vision. Most standard displays can show 256 colors based on 8-bit color depth, enhancing the viewing experience across various media and applications.
Subtracting Colors of Light
- Filters remove specific colors from light, allowing only certain wavelengths to pass through
- The traffic lights use filters to transmit only red or yellow or green light, absorbing all other colours
- Colored filters in stage lights and photography allow for different color effects
- Using a sequence of filters can completely block transmission of light
Color Filter Example
- A red filter transmits only red light, absorbing all other colors from a white light source
- Similarly, other colored filters absorb all colors except the one they transmit
Light Filter Interactions
- The final color produced by combining filters depends on which colors are absorbed or transmitted at each step
- It is possible to use a sequence of filters to completely block light if the colors absorbed are part of an earlier transmission
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