Rayleigh
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Switch fc to R
Rayleigh Unit Table
A list of units symbol and data.
From RTo fcAll conversion
1 R0.09290312990644656 fc
2 R0.18580625981289312 fc
3 R0.2787093897193397 fc
4 R0.37161251962578623 fc
5 R0.46451564953223273 fc
6 R0.5574187794386793 fc
7 R0.6503219093451259 fc
8 R0.7432250392515725 fc
9 R0.836128169158019 fc
10 R0.9290312990644655 fc
Description

Rayleigh (R): Specialized Unit for Atmospheric Light Emissions

The rayleigh is a non-SI unit used to measure the faint emissions of light in the upper atmosphere, such as those produced by auroras or airglow. One rayleigh corresponds to 1010 photons per square meter per second along a vertical column. This unit is especially important in geophysics, atmospheric science, and astrophysics for quantifying extremely low levels of light that are invisible to the human eye but detectable by scientific instruments.

Rayleigh measurements are essential for studying natural light phenomena in the Earth's mesosphere and thermosphere. These emissions play a crucial role in understanding the impact of solar activity on Earth, helping scientists monitor space weather and its effects on satellite communications and navigation systems. By quantifying these subtle luminous occurrences, the rayleigh contributes to our broader understanding of planetary atmospheres and cosmic interactions.

Footcandle (fc): Imperial Unit of Illuminance

The footcandle is a non-SI unit of illuminance used primarily in the United States. It is defined as the illuminance on a one-square-foot surface from a uniform source of light equivalent to one lumen. One footcandle equals approximately 10.764 lux. Despite the global shift towards SI units, the footcandle remains prevalent in certain industries and applications.

Understanding footcandles is important for professionals working in lighting design, architecture, and photography within regions that use imperial measurements. It allows for the assessment and specification of lighting requirements, ensuring that spaces are adequately illuminated according to established standards and practices.

Complete list of conversion for Rayleigh
Rayleigh (R)

1 Rayleigh = 1 Candela

Convert 2 R → cd

1 Rayleigh = 1 Candlepower

Convert 2 R → cp

1 Rayleigh = 1 Lumen

Convert 2 R → lm

1 Rayleigh = 1 Lux

Convert 2 R → lx

1 Rayleigh = 0.09290312990644656 Footcandle

Convert 2 R → fc

1 Rayleigh = 0.0001 Phot

Convert 2 R → ph

1 Rayleigh = 1 Candela per square meter

Convert 2 R → cd/m²

1 Rayleigh = 1 Nit

Convert 2 R → nt

1 Rayleigh = 0.0001 Stilb

Convert 2 R → sb

1 Rayleigh = 0.0003141592653587727 Lambert

Convert 2 R → L

1 Rayleigh = 0.2918635079290997 Footlambert

Convert 2 R → fL

1 Rayleigh = 1 Lumen second

Convert 2 R → lm·s

1 Rayleigh = 1 Lux second

Convert 2 R → lx·s