How Do You Convert 290mcd to Candelas/Meter Square?

  • Context: Undergrad 
  • Thread starter Thread starter alexa179
  • Start date Start date
  • Tags Tags
    Luminosity
Click For Summary
SUMMARY

The conversion from 290 milicandelas (mcd) to candelas per meter square (cd/m²) is not directly possible without additional information. To compute luminance (E) in cd/m² from luminous intensity (I) in candelas, one must use the formula E = I / (r²) cos(α), where 'r' is the distance from the light source to the point of measurement and 'α' is the angle of incidence. This formula is essential for understanding how luminous intensity relates to luminance on a surface.

PREREQUISITES
  • Understanding of luminous intensity (candela)
  • Knowledge of luminance (candelas per meter square)
  • Familiarity with geometric relationships in lighting
  • Basic trigonometry for angle calculations
NEXT STEPS
  • Study the formula for luminance calculation in lighting design
  • Learn about the relationship between luminous intensity and distance
  • Explore practical applications of luminance in interior lighting
  • Research the impact of angle of incidence on light measurement
USEFUL FOR

Lighting designers, electrical engineers, and anyone involved in photometry or lighting calculations will benefit from this discussion.

alexa179
Messages
1
Reaction score
0
Could someone help me out with a conversion question.

How do you convert 290mcd to candelas/meter square?
Or what additional information do I need to make the converstion?

Thanks!
 
Science news on Phys.org
If "mcd" means milicandela then a "conversion" between these two quantities is impossible. I think you have to compute the luminance E (in cd/m^2) at a given point on a surface from a source with a given luminous intensity I (in cd). If this is the case, the equation you need is
E=\frac{I}{r^2}cos \alpha
with r the distance from the source to the point and \alpha the incidence angle (measured from the normal direction).
 

Similar threads

Undergrad Lux-meter, candelas or lux, measuring nits in practice
  • · Replies 2 ·
Replies
2
Views
5K
Undergrad Calculating Candela Power for LED
  • · Replies 8 ·
Replies
8
Views
2K
High School What is the Relationship Between Candelas, Watts, and Brightness?
  • · Replies 8 ·
Replies
8
Views
4K
High School How do I convert from lux to candela?
  • · Replies 8 ·
Replies
8
Views
6K
Undergrad How to calculate focal length?
  • · Replies 8 ·
Replies
8
Views
3K
High School I don't understand exactly how the propagation of light works
  • · Replies 17 ·
Replies
17
Views
4K
Undergrad Fresnel Zone Equation Problem
  • · Replies 8 ·
Replies
8
Views
2K
Undergrad How was the speed of light calculated before the redefinition of the meter?
  • · Replies 8 ·
Replies
8
Views
4K
Graduate Aberration with explicit dependance on object coordinates
  • · Replies 4 ·
Replies
4
Views
2K
Undergrad Questions about the definition of a metre (A. P. French's book)
  • · Replies 17 ·
Replies
17
Views
2K