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Questions and Answers
What is the range of wavelengths for light that the unaided human eye can perceive?
What is the range of wavelengths for light that the unaided human eye can perceive?
Which unit of length is used to express wavelengths of light in or near the visible spectrum?
Which unit of length is used to express wavelengths of light in or near the visible spectrum?
What is the immediate wavelength range of ultraviolet radiation?
What is the immediate wavelength range of ultraviolet radiation?
In which region of the electromagnetic spectrum does infrared radiation lie?
In which region of the electromagnetic spectrum does infrared radiation lie?
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What is a unit of luminous intensity that was used prior to 1946 and equal to the luminous intensity of a wax candle of standard specifications?
What is a unit of luminous intensity that was used prior to 1946 and equal to the luminous intensity of a wax candle of standard specifications?
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What is the basic SI unit of luminous intensity defined as the luminous intensity of a source emitting monochromatic radiation of certain frequency and radiant intensity?
What is the basic SI unit of luminous intensity defined as the luminous intensity of a source emitting monochromatic radiation of certain frequency and radiant intensity?
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What is the definition of Cross light?
What is the definition of Cross light?
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Which type of sky is defined as having less than 30% cloud cover with the solar disk unobstructed?
Which type of sky is defined as having less than 30% cloud cover with the solar disk unobstructed?
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What is the primary function of the CIE (Commission Internationale de I’Eclairage)?
What is the primary function of the CIE (Commission Internationale de I’Eclairage)?
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What does the IES (Illuminating Engineering Society) focus on?
What does the IES (Illuminating Engineering Society) focus on?
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In the Daylight factor method, what does the term 'daylight factor' measure?
In the Daylight factor method, what does the term 'daylight factor' measure?
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What characterizes an Overcast sky according to the CIE standard?
What characterizes an Overcast sky according to the CIE standard?
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What type of lighting is designed to provide a relatively high level of illumination over a small area?
What type of lighting is designed to provide a relatively high level of illumination over a small area?
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Which type of lighting is used to call attention to a particular object or feature?
Which type of lighting is used to call attention to a particular object or feature?
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What is the purpose of sidelight?
What is the purpose of sidelight?
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Which type of lighting is known for producing high contrast and distinct shadows on the subject?
Which type of lighting is known for producing high contrast and distinct shadows on the subject?
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What percentage of emitted light is distributed downward in semi-direct lighting?
What percentage of emitted light is distributed downward in semi-direct lighting?
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Which term is used to describe the sensation caused by excessively bright light in the visual field?
Which term is used to describe the sensation caused by excessively bright light in the visual field?
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What is the term for the change of direction of a ray of light as it passes obliquely from one medium to another?
What is the term for the change of direction of a ray of light as it passes obliquely from one medium to another?
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Which term describes the modulation of light or sound waves as they bend around obstacles?
Which term describes the modulation of light or sound waves as they bend around obstacles?
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What is the angle that a refracted ray makes with a normal to the interface between two media called?
What is the angle that a refracted ray makes with a normal to the interface between two media called?
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Which term refers to light being scattered from an irregular surface or diffusing through a translucent material?
Which term refers to light being scattered from an irregular surface or diffusing through a translucent material?
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What does 'translucent' mean when referring to materials?
What does 'translucent' mean when referring to materials?
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Which device is an example of a source for producing light or heat using electricity or gas?
Which device is an example of a source for producing light or heat using electricity or gas?
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What is luminance a quantitative measure of?
What is luminance a quantitative measure of?
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What unit of luminance is equal to 0.32 candela per square centimeter?
What unit of luminance is equal to 0.32 candela per square centimeter?
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What principle does the Law of Reflection describe?
What principle does the Law of Reflection describe?
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What is the angle of reflection defined as?
What is the angle of reflection defined as?
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In what context does 'incidence' occur?
In what context does 'incidence' occur?
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How is 'brightness' defined in relation to luminance?
How is 'brightness' defined in relation to luminance?
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