Answer: Candela.
- A Candela
- B Lumen
- C Watt
- D Lux
Correct answer: A. Candela
Explanation: The candela is one of the seven SI base units and measures luminous intensity. Lux and lumen are derived units of illuminance and luminous flux.
The 7 SI base units. All derived units (newton, joule, watt, volt, etc.) can be expressed as combinations of these 7 fundamental units raised to various powers.
Concept context
SI base units, dimensional analysis, significant figures, and error propagation. The toolkit every physics calculation relies on.