Bohren & Huffman reference values

← Verification · Spheres · Plane wave
Reference
Bohren & Huffman reference values
Kind
paper: a published number or figure
Calculated
Q, backscattering
Agreement
1e-5 (printed digits)
Bohren & Huffman's BHMIE case, m = 1.55 at 0.6328 µm: the printed Q_ext and Q_back The book's Appendix A runs BHMIE for a sphere of m = 1.55, a = 0.525 µm at 0.6328 µm and prints Q_ext and Q_back to six figures; PyStratify's curves through that radius, Q_back from its far-field pattern at 180°.
0.460.480.50.520.540.560.580.6123456radius [µm]Q
Qext, PyStratify Qback, PyStratify Qext = 3.10543, printed (a = 0.525 µm) Qback = 2.92534, printed
Hover to read values.
  • largest difference from the printed values (5 digits): 4.47×10⁻⁶
  • PyStratify the lines, the reference the circles

Run it yourself: sphere_checks.py · test_physics.py · test_farfield.py · figures.py · SPHERE_CHECKS.md on GitHub, PyStratify 97e52a9