Tech From Here: NL · Sources

Why does a chandelier throw rainbows?

Tech From Here: NL, beyond Dutch Design Week

The work this post covers and every source it draws on, each linked to the original.

Research cited

  1. wording set by Staatsblad 2007, 462 zoek.officielebekendmakingen.nl

Other sources

  1. OpenStax, University Physics Volume 3, section 1.5 Dispersion openstax.org
  2. Rijksmuseum BK-1970-126, 'Kan van kristal met deksel van zilver', c. 1900 rijksmuseum.nl
  3. OpenStax, University Physics Volume 3, section 1.4 Total Internal Reflection openstax.org
  4. Warenwetbesluit glasartikelen (BWBR0002841), artikel 2 a and b, geldend van 21-01-2020 wetten.overheid.nl
  5. BK 17463 a052d6ceab1d8734c01908ce7ea7520e (rijksmuseum.nl) rijksmuseum.nl

Images, slide by slide

Slide 1
A lit shop window at night seen past a dark door frame: crystal chandeliers hang over a pale sofa, a painted chair and side tablesPhoto: RN Collins
Slide 2
Close view of three lit chandeliers in a shop window: one a basket of strung glass beads, one with curved glass arms and frosted shades, one of gilt leaves hung with glass dropsPhoto: RN Collins
Slide 3
Bar chart of how far apart red and violet light bend in three materials: crown glass 0.018, flint glass 0.036, diamond 0.048, from the OpenStax index tableImage: RN Collins studio, code-drawn. Checked against OpenStax, University Physics Vol. 3, Table 1.2 (index of refraction at six wavelengths); differences computed by RN Collins studio
Slide 4
A tall clear glass jug with a silver lid, its surface cut into a dense pattern of small stars and straight flutes near the base, on a gray groundSource: Rijksmuseum, AmsterdamMuseum or journal record
Slide 5
Bar chart of critical angles against air: crown glass 41.2 degrees, glass at the legal lead-crystal minimum index 40.3, flint glass 36.9, diamond 24.4Image: RN Collins studio, code-drawn. Checked against OpenStax, University Physics Vol. 3, 1.4 (critical angle formula; diamond 24.4°) and Table 1.2 (yellow light); other angles computed by RN Collins studio
Slide 6
Two side-by-side boxes of the Dutch legal definitions: full lead crystal 30 percent needs 30 percent lead oxide, density 3,000 kilograms per cubic meter, index 1.545; lead crystal 24 percent needs 24 percent, 2,900, and 1.545Image: RN Collins studio, code-drawn. Checked against Warenwetbesluit glasartikelen (BWBR0002841), art. 2 a and b, wetten.overheid.nl; Staatsblad 2007, 462
Slide 7
A chandelier of painted white porcelain with flower decoration on a gilt bronze frame, six candle arms and hanging pointed drops, on a gray groundSource: Rijksmuseum, AmsterdamMuseum or journal record

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