Question:
The S.I. unit of Luminous Intensity.
The S.I. unit of Luminous Intensity.
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SI base units include:
- Length → meter (m)
- Mass → kilogram (kg)
- Time → second (s)
- Luminous intensity → candela (cd)
Updated On: May 13, 2026
- Joule
- Watt
- Mole
- Candela
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The Correct Option is D
Solution and Explanation
Concept:
Luminous intensity is a fundamental physical quantity in photometry that measures the amount of visible light emitted by a source in a particular direction.
Step 1: Identify SI unit.
The SI unit of luminous intensity is: \[ \text{Candela (cd)} \]
Step 2: Analyze the options.
• Joule → unit of energy
• Watt → unit of power
• Mole → unit of amount of substance
• Candela → unit of luminous intensity
Step 3: Final conclusion.
Thus, the correct SI unit is: \[ Candela \]
Step 1: Identify SI unit.
The SI unit of luminous intensity is: \[ \text{Candela (cd)} \]
Step 2: Analyze the options.
• Joule → unit of energy
• Watt → unit of power
• Mole → unit of amount of substance
• Candela → unit of luminous intensity
Step 3: Final conclusion.
Thus, the correct SI unit is: \[ Candela \]
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