ਰੋਸ਼ਨੀ ਇੱਕ ਤਾਰਾ ਯੂਨਿਟ ਇੱਕ ਪੂਰੀ ਤਰ੍ਹਾਂ ਫੈਲਣ ਵਾਲੀ ਸਤਹ ਦੀ ਚਮਕ ਹੈ ਜੋ ਪ੍ਰਤੀ ਸੈਂਟੀਮੀਟਰ ਇੱਕ ਟਿਊਬਲਰ ਕੈਵਿਟੀ ਨੂੰ ਛੱਡਦੀ ਹੈ ਜਾਂ ਪ੍ਰਤੀਬਿੰਬਤ ਕਰਦੀ ਹੈ,

Noun:

ਲੈਂਬਰਟ,

lamberts's Usage Examples:

The Society of Motion Picture and Television Engineers (SMPTE) recommended, in SMPTE 196M, a screen luminance of 16"nbsp;foot-lamberts for commercial movie theaters, when measured open-gate (i.

Mathematically,L_\mathrm v E_\mathrm v \times R,whereL_\mathrm v is the luminance, in foot-lamberts,E_\mathrm v is the illuminance, in foot-candles, andR is the reflectivity, expressed as a fractional number (for example, a grey card with 18% reflectivity would have R 0.

foot-lamberts is equal to the incident illuminance in foot-candles.

The minimum required highlight brightness varies based on the type and level of Flight Simulation Training Device (FSTD), but is generally 3–6 foot-lamberts for most devices qualified under Federal Aviation Administration (FAA) or Joint Aviation Authorities (JAA) regulations.

Luminance levels can vary from hundreds of foot-lamberts for sunlight readable switch displays per MIL-PRF-22885 to only a few foot-lamberts in night conditions for panels in accordance with SAE AS7788.

Military specifications for illuminated switches, panels, and displays, such as MIL-PRF-22885 and SAE AS7788, also require luminance measurements in foot-lamberts.

The luminance of a perfect Lambertian diffuse reflecting surface in foot-lamberts is equal to the incident illuminance in foot-candles.