IndexGelombang, Kekacauan & MateriTee
Murmura
The Whispering Gallery Physics
Size guide S–5XL · inches
Murmura whispers into the wall, and her voice runs all the way round to the far side.
The Physics
In a round gallery, sound clings to the curved wall and travels around it rather than spreading through the space, so a whisper can be heard on the far side. A wave fits around the circle when a whole number of wavelengths matches the circumference. Light does the same in tiny glass rings and spheres.
2πR ≈ m λ
- R: radius (m)
- m: whole number of wavelengths (dimensionless)
- λ: wavelength (m)
Lord Rayleigh explained the whispering gallery of St Paul's Cathedral in 1910; optical whispering-gallery resonators reach Q > 10¹¹.
Honest caveat: It is not an echo: the sound hugs the wall.
On the shirt
Front: Murmura, the pixel-art character, with the title. Back: the resonance condition, the St Paul's story, the optical resonators and Rayleigh's 1910 paper. Printed on a unisex tee.
Shipping calculated at checkout by destinationMade to order, ships in 2–5 business days
Details
Size & fitS–5XL
Unisex heavy cotton (Gildan 5000), classic fit.
| Size | Width | Length | Sleeve |
|---|---|---|---|
| S | 18 | 28 | 15.1 |
| M | 20 | 29 | 16.5 |
| L | 22 | 30 | 18 |
| XL | 24 | 31 | 19.5 |
| 2XL | 26 | 32 | 21 |
| 3XL | 28 | 33 | 22.4 |
| 4XL | 30 | 34 | 23.7 |
| 5XL | 32 | 35 | 25 |
Sebagai skala: ukuran M selebar 20 in (50.80 cm), sekitar 3.143 × 1034 panjang Planck (lP = 1.616255 × 10−35 m). Meteran lebih cepat.
Measurements in inches, ±1.5 in tolerance.
ShippingBy destination
Shipping calculated at checkout by destination. Printed to order for you.
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.
Field notes
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