{"product_id":"the-magnetic-bottle-plate-078-physics-poster","title":"The Magnetic Bottle – Plate 078 Physics Poster","description":"\u003cp\u003ePlate 78 speaks for itself: \u003cem\u003e“Earth keeps a cage of charged rain.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eCharged particles spiral along Earth's field lines and are reflected where the field strengthens near the poles, bouncing between hemispheres in the Van Allen belts.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eμ = m v⊥² \/ (2B)\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eμ: magnetic moment, an adiabatic invariant, J T⁻¹\u003c\/li\u003e\n\u003cli\u003em: particle mass, kg\u003c\/li\u003e\n\u003cli\u003ev⊥: speed perpendicular to B, m s⁻¹\u003c\/li\u003e\n\u003cli\u003eB: magnetic flux density, T\u003c\/li\u003e\n\u003cli\u003eα: pitch angle, rad\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003esin²α\/B is conserved (μ invariant). Explorer 1's Geiger counter saturated in 1958.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eJ. A. Van Allen et al., Jet Propulsion 28, 588 (1958).\u003c\/li\u003e\n\u003cli\u003eF. F. Chen, Introduction to Plasma Physics, Ch. 2.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 078, “The Magnetic Bottle”: the pixel-art plate with its slogan “Earth keeps a cage of charged rain.”, the key equation and the facts panel shown above. Pixelated Physics. Physics. Personified.\u003c\/p\u003e","brand":"Printify","offers":[{"title":"9'' x 12\" (Vertical) \/ Matte","offer_id":50962678415463,"sku":"64429067427609434871","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50962678448231,"sku":"15897707251834325340","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50962678480999,"sku":"18613620760445462763","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50962678513767,"sku":"25339663733593637647","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50962678546535,"sku":"14170562644123981886","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50962678579303,"sku":"89100810368014327356","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50962678612071,"sku":"32879617292721303984","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50962678644839,"sku":"12942943092040003667","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50962678677607,"sku":"21340914249123756333","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/13213499746043954080_2048.jpg?v=1793636611","url":"https:\/\/pixelatedphysics.com\/ko\/products\/the-magnetic-bottle-plate-078-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}