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Questions and Answers
What is the basic unit of photometry used to express luminous flux?
What is the basic unit of photometry used to express luminous flux?
At which wavelength is bright vision best, according to the CIE standards?
At which wavelength is bright vision best, according to the CIE standards?
What is the SI unit equivalent of one footcandle (fc)?
What is the SI unit equivalent of one footcandle (fc)?
Which condition describes the response of the eye under bright-light conditions?
Which condition describes the response of the eye under bright-light conditions?
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What describes the luminous intensity emitted into the entire viewing area?
What describes the luminous intensity emitted into the entire viewing area?
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Which photometric quantity measures the intensity of light incident on a surface?
Which photometric quantity measures the intensity of light incident on a surface?
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What is the unit used to express luminance intensity?
What is the unit used to express luminance intensity?
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Which of the following statements is true about the CIE's recognition of vision types?
Which of the following statements is true about the CIE's recognition of vision types?
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What is the primary unit used to express luminous flux?
What is the primary unit used to express luminous flux?
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Scotopic vision is associated with the use of cones in the eye.
Scotopic vision is associated with the use of cones in the eye.
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What is the luminous flux incident on one square foot called?
What is the luminous flux incident on one square foot called?
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Luminance is expressed in units of ______.
Luminance is expressed in units of ______.
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Match the following photometric quantities with their descriptions:
Match the following photometric quantities with their descriptions:
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Which photometric unit is equivalent to one lumen per square meter?
Which photometric unit is equivalent to one lumen per square meter?
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The maximum photopic eye response occurs at a wavelength of 505 nm.
The maximum photopic eye response occurs at a wavelength of 505 nm.
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A solid angle is measured in ______.
A solid angle is measured in ______.
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