{"product_id":"leavitts-law-plate-070-physics-poster","title":"Leavitt's Law – Plate 070 Physics Poster","description":"\u003cp\u003ePlate 70 speaks for itself: \u003cem\u003e“Slow is bright.”\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eThe Physics\u003c\/h3\u003e\u003cp\u003eHenrietta Leavitt found that Cepheid variables with longer pulsation periods are more luminous. Calibrated, the period gives the true brightness, turning Cepheids into distance markers.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eM_V = a log₁₀ P + b\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eM_V: absolute visual magnitude, dimensionless\u003c\/li\u003e\n\u003cli\u003eP: pulsation period, days\u003c\/li\u003e\n\u003cli\u003ea, b: calibration constants\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eLonger-period Cepheids are brighter. M_V = −2.43(log P − 1) − 4.05.\u003c\/p\u003e\u003ch3\u003eSources\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eH. S. Leavitt, E. C. Pickering, Harvard Coll. Obs. Circ. 173 (1912).\u003c\/li\u003e\n\u003cli\u003eG. F. Benedict et al., Astron. J. 133, 1810 (2007).\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOn the poster\u003c\/h3\u003e\u003cp\u003ePlate 070, “Leavitt's Law”: the pixel-art plate with its slogan “Slow is bright.”, 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":50962642665575,"sku":"16679663427119480809","price":19.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Fine Art","offer_id":50962642698343,"sku":"97892554898297062030","price":29.99,"currency_code":"USD","in_stock":true},{"title":"9'' x 12\" (Vertical) \/ Semi Glossy","offer_id":50962642731111,"sku":"23353698163876678924","price":19.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Fine Art","offer_id":50962642763879,"sku":"54496766657809503096","price":44.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Semi Glossy","offer_id":50962642796647,"sku":"14117021903116755519","price":29.99,"currency_code":"USD","in_stock":true},{"title":"18″ x 24″ (Vertical) \/ Matte","offer_id":50962642829415,"sku":"98793604155469137135","price":29.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Matte","offer_id":50962642862183,"sku":"19972868685381830333","price":69.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Fine Art","offer_id":50962642894951,"sku":"30433647826361707735","price":119.99,"currency_code":"USD","in_stock":true},{"title":"36'' x 48\" (Vertical) \/ Semi Glossy","offer_id":50962642927719,"sku":"24678345735673527271","price":69.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0596\/8746\/9159\/files\/1701552156595672000_2048.jpg?v=1793635441","url":"https:\/\/pixelatedphysics.com\/it\/products\/leavitts-law-plate-070-physics-poster","provider":"Pixelated Physics","version":"1.0","type":"link"}