SI Units

कैंडेला

परिभाषा

प्रकाशीय तीव्रता की SI मूल इकाई, 540 THz एकवर्णी विकिरण की प्रकाशीय दक्षता 683 lm/W निर्धारित करके परिभाषित।

व्याख्या

One candela approximates the luminous intensity of a common wax candle, from which the unit takes its name. A 60-watt incandescent bulb emits roughly 60–80 candela in all directions. The candela specifically measures intensity in a given direction, making it the foundation for both lumen (total flux) and lux (illuminance) calculations.

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