Radiant Exposure

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Equation / Last modified by KurtHeckman on 2018/08/13 19:37
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EmilyB.Radiant Exposure
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The Radiant Exposure calculator computes the radiant exposure based on the irradiance of the surface and the time of exposure.

INSTRUCTIONS: Enter the following:

  • (Ev)  This  is the irradiance of the surface area in watts per square meter.
  • (t) This is the  duration of the exposure

Radiant Exposure (He):  The calculator returns the exposure in Newtons per Meter which is equivalent to Joules per seconds • meter square (J / s•m²).

Related Calculators:

The Math / Science

The Radiant Exposure in photography is the amount of light per unit area reaching a photographic film or electronic image sensor, as determined by shutter speed, lens aperture and scene luminance. The formula for radaint exposure is:
  He = Ev • t
where:

  • He = radiant exposure
  • Ee = irradiance of the surface
  • t = exposure duration

References

Wikipedia (https://en.wikipedia.org/wiki/Exposure_(photography))