What is luminous intensity?
Q: What is luminous intensity?
A: Luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per solid angle unit.
Q: How is luminous intensity measured?
A: Luminous intensity is measured based on the luminosity function, a standardized model of the sensitivity of the human eye.
Q: What is the standardized model of the sensitivity of the human eye called?
A: The standardized model of the sensitivity of the human eye is called the luminosity function.
Q: What is the SI unit of luminous intensity?
A: The SI unit of luminous intensity is the candela (cd).
Q: Is the candela an SI base unit?
A: Yes, the candela is an SI base unit.
Q: Can luminous intensity be used to determine brightness of a light source?
A: Yes, luminous intensity can be used to determine the brightness of a light source as it measures the power emitted per solid angle unit.
Q: Why is luminous intensity important in photometry?
A: Luminous intensity is important in photometry as it allows for accurate measurement of the brightness of a light source, taking into account the sensitivity of the human eye.
