Phot to Candela Steradian per Square Meter Conversion

Convert between Phot and Candela Steradian per Square Meter quickly and accurately.

From Phot

To Candela Steradian per Square Meter

cd·sr/m²

How to Convert Phot to Candela Steradian per Square Meter

Conversion Formula

1 ph = 10000 cd·sr/m²

1 cd·sr/m² = 0 ph

Example

Convert 15 ph to cd·sr/m²:

15 ph = 15 × 10000 cd·sr/m² = 150000 cd·sr/m²

Unit Information

Learn about the illumination units you're converting between

Phot

Definition

The Phot is a CGS unit of illuminance equal to 10,000 lux, representing one lumen per square centimeter. It is a larger unit used for measuring very high levels of illumination, particularly in scientific and technical applications where high light intensities are common.

History/Origin

Developed as part of the CGS system of units, where the phot provided a convenient way to express high illumination values. It was widely used in scientific literature and technical applications before the adoption of SI units became standard practice.

Current Use

Primarily found in older scientific literature and specialized technical applications. It provides a practical scale for measuring very bright light sources and is still occasionally referenced in photometric research and historical technical documents.

Multiplier

10000

Offset

Candela Steradian per Square Meter

cd·sr/m²

Definition

The Candela Steradian per Square Meter is a unit of illuminance that is dimensionally equivalent to the lux. It represents the luminous intensity per unit solid angle per unit area, providing an alternative way to express illuminance in terms of fundamental photometric quantities.

History/Origin

Derived from the fundamental definitions of luminous intensity and solid angle in the SI system. It provides a direct relationship between illuminance and the basic photometric quantities, emphasizing the geometric aspects of light measurement.

Current Use

Used in theoretical photometry and in calculations where the relationship between luminous intensity, solid angle, and area is emphasized. It provides a fundamental understanding of illuminance in terms of basic photometric principles.

Multiplier

Offset