• Pixel-art Driftgale, the Thermal-Drift Wind Spirit, on a black mug with the slogan "ONE KELVIN. 23 MICRONS. NO FRINGES."

IndexCatalogueMug

Driftgale, the Thermal-Drift Wind Spirit Mug

$21.99 USD
$21.99 USD
सेल बिक चुका
Size

Aluminium's thermal expansion coefficient is about 23 × 10⁻⁶ K⁻¹, so a 1 m aluminium path grows 23 µm per kelvin, about 36 HeNe wavelengths.

The joke: Interferometrists know the AC cycling at night shifts fringes by dozens of wavelengths. The slogan on the mug reads ONE KELVIN. 23 MICRONS. NO FRINGES.

Source: CRC Handbook of Chemistry and Physics, 'Thermal expansion of metals' (αAl ≈ 23.1 × 10⁻⁶ K⁻¹).

Shipping calculated at checkout by destinationMade to order, ships in ~10 days

Details

Size & material11oz · 15oz

Black glossy ceramic mug with a C-handle. Lead- and BPA-free.

  • 11oz: 0.33 l
  • 15oz: 0.44 l
CareDishwasher & microwave safe

Dishwasher safe (top rack) or hand wash. Microwave safe.

ShippingBy destination

Shipping calculated at checkout by destination.

Made to order: about 10 days of production and handling before it ships.

Delivery times & where we ship

Returns & replacements21 days

Every item is printed to order, so we can’t accept returns or exchanges for change of mind, or if you ordered the wrong size or colour.

Print defect, misprint, damage or the wrong item? We’ll send a free replacement, or a refund if you prefer. Report it within 21 days of delivery with a photo; no need to send it back.

Full refund & replacement policy

Field notes

सभी देखें
1 3
सभी देखें