User:Sbb/Come back to

• Talk:Bourrasque-class destroyer – asked 22 Aug 2021. Check back by 20 Sept 2021.
• List of ship classes of World War II
• Category:Lists of shipwrecks by year
• Category:Ships of the United States Navy
• List of United States Navy three-star admirals since 2010
• Add cmils/kcmil/MCM to {{convert}}/{{val}} conversions and units. Replace manual conversion in Litz wire
• Create Sign convention (optics) page. A simple search shows the following articles mention sign convention (or even link to sign convention) and briefly (too briefly, IMO) explain it:
  • Optics § Lenses
  • Radius of curvature (optics)
  • Geometric optics
  • Vergence (optics)
  • Cardinal point (optics) § Principal planes and points
  • Fourier optics
  • Thin lens § Focal length
  • Lens § Lensmaker's equation
  • Focal length § General optical systems
  • Spherical aberration § Correction
  • Magnification §§ Single lens​ and Photography

And relatedly (slightly different convention, for left/right polarization:

• • Polarization (waves)
  • Circular polarization
  • Fresnel equations