// multi-utility computation suite · offline · instant · precise
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│ [c] calcalyst_ │
│ computation suite │
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sci.solid-angle-steradian-flux Calculator
Calculates solid angle Ω = A/r² in steradians subtended by a surface at a point, and fraction of total sphere (4π sr). Full sphere = 4π sr ≈ 12.57 sr — a 1 m² surface at 10 m distance subtends 0.01 sr; photometric calculations use solid angle to relate luminous intensity to luminous flux.
Inputs
Half Angle Deg
Reference formula or conversion factor shown for context.
R M
Separation between two points or total path length. Check that units are consistent throughout the calculation.
Total Flux Lm
Reference formula or conversion factor shown for context.
Results
solid angle Ω (steradians)
The computed angle in degrees or radians.
fraction of total flux captured
The combined total across all inputs and components.
flux within cone (lm or W)
Sample size or count used in the calculation.
irradiance/illuminance at r (lux or W/m²)
IRR (internal rate of return) -- the annualised return rate at which net present value equals zero. If IRR exceeds the hurdle rate, the investment adds value.
Ω = 2π(1−cos θ) | full sphere: 4π ≈ 12.57 sr
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
applications
Recommended use case or application for this configuration or result.