Foot-lambert
Foot-lambert (fL) is a unit of luminance used in the field of photometry. It is defined as the luminance of a surface that emits or reflects one lumen per square foot. The foot-lambert is named after the German physicist Johann Heinrich Lambert, who made significant contributions to the study of light and optics.
Definition[edit | edit source]
A foot-lambert is equal to 1/π candela per square foot. This unit is commonly used in the United States and other countries that use the imperial system of measurement. The SI unit equivalent of the foot-lambert is the candela per square meter, also known as the nit.
Applications[edit | edit source]
Foot-lamberts are primarily used in the fields of cinematography, theater, and display technology to measure the brightness of screens and projected images. For example, in the context of movie theaters, the brightness of the screen is often specified in foot-lamberts to ensure a consistent viewing experience.
Conversion[edit | edit source]
To convert foot-lamberts to candelas per square meter (nits), the following formula is used:
- 1 fL = 3.426 nits
Related Units[edit | edit source]
See Also[edit | edit source]
References[edit | edit source]
External Links[edit | edit source]
 | This physics-related article is a stub. You can help WikiMD by expanding it. |
Search WikiMD
Ad.Tired of being Overweight? Try W8MD's physician weight loss program.
Semaglutide (Ozempic / Wegovy and Tirzepatide (Mounjaro / Zepbound) available.
Advertise on WikiMD
|
WikiMD's Wellness Encyclopedia |
| Let Food Be Thy Medicine Medicine Thy Food - Hippocrates |
Translate this page: - East Asian
中文,
日本,
한국어,
South Asian
हिन्दी,
தமிழ்,
తెలుగు,
Urdu,
ಕನ್ನಡ,
Southeast Asian
Indonesian,
Vietnamese,
Thai,
မြန်မာဘာသာ,
বাংলা
European
español,
Deutsch,
français,
Greek,
português do Brasil,
polski,
română,
русский,
Nederlands,
norsk,
svenska,
suomi,
Italian
Middle Eastern & African
عربى,
Turkish,
Persian,
Hebrew,
Afrikaans,
isiZulu,
Kiswahili,
Other
Bulgarian,
Hungarian,
Czech,
Swedish,
മലയാളം,
मराठी,
ਪੰਜਾਬੀ,
ગુજરાતી,
Portuguese,
Ukrainian
Medical Disclaimer: WikiMD is not a substitute for professional medical advice. The information on WikiMD is provided as an information resource only, may be incorrect, outdated or misleading, and is not to be used or relied on for any diagnostic or treatment purposes. Please consult your health care provider before making any healthcare decisions or for guidance about a specific medical condition. WikiMD expressly disclaims responsibility, and shall have no liability, for any damages, loss, injury, or liability whatsoever suffered as a result of your reliance on the information contained in this site. By visiting this site you agree to the foregoing terms and conditions, which may from time to time be changed or supplemented by WikiMD. If you do not agree to the foregoing terms and conditions, you should not enter or use this site. See full disclaimer.
Credits:Most images are courtesy of Wikimedia commons, and templates Wikipedia, licensed under CC BY SA or similar.
Contributors: Prab R. Tumpati, MD
