Vintage Bulb Spectra: emission line spectra identify the gas within these two vintage discharge glow bulbs- revealed here by a 500 line/mm diffraction grating. The color of each gas is due to a mix of the colors emitted from electron energy transitions specific to each element, the basis of spectroscopy. ➡️ Follow the link in my profile for info on where to get a diffraction grating slide and many other amazing items featured here on @physicsfun #physics #physicstoy #physicsfun #neon #argon #emi

~ SPECTRA S2 BREAST PUMP REVIEW ~ "I recently moved to a S2 from another well known brand. I literally doubled my output & halved my time. The pump is so easy to use & super quiet. The adjustable vacuum/speed makes it suitable for everyone. Also love that it's a closed system, so super hygienic. My only regret is not finding Spectra sooner." --> BUY HERE: http://buff.ly/2aV1J4N - #spectrateam | Spectra Baby Australia

スペクトルS2 試打動画【卓球応援団】