{"product_id":"linewell-21-cm-line-pixel-sticker","title":"Linewell – 21 cm Line Physics Sticker","description":"\u003cp\u003eMeet Linewell, a hydrogen atom who hums a single radio note when his spin flips. That photon has a frequency of about 1420.4 MHz and a wavelength of about 21 cm. Predicted in 1944 and detected in 1951, it lets radio telescopes map the Milky Way's spiral arms. Pixel-art kiss-cut sticker in 2, 3, 4 and 6 inches; equation, symbols and sources in the physics panel below.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"2\" × 2\" \/ White","offer_id":50658304295015,"sku":"20976814997757186190","price":4.99,"currency_code":"USD","in_stock":true},{"title":"3\" × 3\" \/ White","offer_id":50658304327783,"sku":"27966352419688801601","price":6.99,"currency_code":"USD","in_stock":true},{"title":"4\" × 4\" \/ White","offer_id":50658304360551,"sku":"26557704068364315048","price":8.99,"currency_code":"USD","in_stock":true},{"title":"6\" × 6\" \/ White","offer_id":50658304393319,"sku":"67509277368013021648","price":11.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/01_clean_d8c0e33c-9d8f-4786-a801-6d12313a9810.jpg?v=1792798557","url":"https:\/\/pixelatedphysics.com\/products\/linewell-21-cm-line-pixel-sticker","provider":"Pixelated Physics","version":"1.0","type":"link"}