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How to Convert from Watt/sq. cm (at 555 nm) to Centimeter-candle [cm*c]
Learn the method to convert illumination values from watt per square centimeter at 555 nm to the obsolete photometric unit centimeter-candle, used historically in photometry and lighting research.
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Watt/sq. cm (at 555 nm) to Centimeter-candle [cm*c] Conversion Table
| Watt/sq. cm (at 555 nm) | Centimeter-candle [cm*c] |
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Custom Unit Conversion Table Generator – Instant Printable Conversion Tables
Enter the starting number (positive decimal or integer ≥ 0). Example: 0.1, 1, 5.
Enter the ending number (positive decimal or integer > Start Value). Example: 10, 50, 100.
Enter the step size (positive decimal > 0 and < End Value – Start Value). Example: 1.0, 2.5.
| Watt/sq. cm (at 555 nm) | Centimeter-candle [cm*c] |
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What Is This Tool?
This converter transforms illumination measurements from watt per square centimeter at 555 nm, a radiometric irradiance unit, into centimeter-candle, a deprecated unit of illuminance previously common in photometry. It allows users to interpret monochromatic radiant power data in a luminous metric essential for analyzing historical lighting standards and calibrations.
How to Use This Tool?
- Enter the value in watt per square centimeter at 555 nm you wish to convert.
- Select watt/sq. cm (at 555 nm) as the source unit and centimeter-candle [cm*c] as the target unit.
- Initiate the conversion to obtain equivalent illumination values in centimeter-candle.
Key Features
- Converts radiometric irradiance at 555 nm to an older photometric illuminance unit.
- Supports analysis of legacy lighting data and historical photometric specifications.
- Facilitates calibration and comparison in vision science and photobiology contexts.
Examples
- 0.5 Watt/sq. cm (at 555 nm) converts to 341.5 Centimeter-candle [cm*c].
- 2 Watt/sq. cm (at 555 nm) converts to 1366 Centimeter-candle [cm*c].
Common Use Cases
- Calibrating light sources and photometers by translating irradiance to illuminance values.
- Conducting vision science and psychophysical studies at the photopic sensitivity peak.
- Evaluating exposure and safety levels for green optical devices in photobiological testing.
- Interpreting historical lighting data expressed in candle-based units.
- Analyzing legacy photographic lighting and optical instrument specifications.
Tips & Best Practices
- Ensure the light source is monochromatic at 555 nm to apply this conversion accurately.
- Use this tool for understanding legacy data rather than replacing modern lux measurements.
- Consider the context of units when comparing centimeter-candle results to contemporary photometric data.
Limitations
- Centimeter-candle is an outdated unit replaced by the SI unit lux and may not align directly with modern measurements.
- Conversion applies specifically to monochromatic light at 555 nm and uses a fixed luminous efficacy factor.
- Different wavelengths require alternate conversion considerations not covered by this tool.
Frequently Asked Questions
- What does watt/sq. cm (at 555 nm) measure?
- It measures radiant power incident per unit area at the specific wavelength 555 nm, which corresponds to the peak of photopic luminous efficiency.
- Why is centimeter-candle considered obsolete?
- The centimeter-candle has been replaced by the SI unit lux and was used historically for measurements close to point light sources.
- Can this conversion be used for other wavelengths?
- No, this conversion is valid only for monochromatic light at 555 nm, as it relies on a specific luminous efficacy.
Key Terminology
- Watt/sq. cm (at 555 nm)
- A radiometric irradiance unit measuring radiant power per area at the 555 nm wavelength, important for photopic light sensitivity assessment.
- Centimeter-candle [cm*c]
- An outdated illuminance unit representing illumination one centimeter from a one candle point source, approximately equal to 10,000 lux.
- Luminous efficacy
- The factor 683 lumens per watt representing how radiant power at 555 nm converts to perceived luminous intensity.