"Candela" is the unit name of which quantity?
Correct answer: B. Intensity
- A. Time
- B. Intensity
- C. Mole
- D. Meter
Explanation
The candela (cd) is the SI unit for luminous intensity. Luminous intensity is a measure of the amount of light emitted in a particular direction. It takes into account the sensitivity of the human eye to different wavelengths of light. The candela is defined based on the perceived brightness of a light source, making it a unit related to human vision.
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About Measurements
Physical quantities are expressed with SI base and derived units, while measurement limits are described through accuracy, precision, absolute and percentage error, and significant figures. Dimensional analysis checks equations, derives relationships and detects inconsistent units, but it cannot determine numerical constants or distinguish quantities with identical dimensions.
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