| 发行方 | Austria |
|---|---|
| 年份 | 2025 |
| 类型 | Non-circulating coin |
| 面值 | 20 Euros |
| 货币 | Euro (2002-date) |
| 材质 | Silver (.925) |
| 重量 | 22.42 g |
| 直径 | 34 mm |
| 厚度 | |
| 形状 | Round |
| 制作工艺 | Colored, Milled |
| 方向 | Medal alignment ↑↑ |
| 雕刻师 | |
| 流通至 | |
| 参考资料 | KM#3392 |
| 正面描述 | A circular wave curves upwards on the obverse of the coin. Representing an Einstein ring, this is the pictorial multiplication of the light source on the left. Between the light source and the observer, a cluster of galaxies is simplified in the centre, which deflects the light many times due to its gravity. The German for ‘gravitational lens’ refers to its function in this context. The formula Δ∅=4GM/bcÇ, which can be used to calculate the deflection of light, completes the design. |
|---|---|
| 正面文字 | Latin |
| 正面铭文 | REPUBLIK ÖSTERREICH 2025 Δ∅ Δ∅= 4GM/bc² LICHT-QUELLE GRAVITATIONS-LINSE 20 EURO |
| 背面描述 | The coin’s reverse has the same basic shape as the obverse but features a colour-printed interpretation of an Einstein ring. |
| 背面文字 | Latin |
| 背面铭文 | EINSTEINRING |
| 边缘 | Plain |
| 铸币厂 | |
| 铸造量 | 2025 - Proof - 30 000 |
| Numisquare 编号 | 2443954760 |
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