We dunk a glowing lightbulb in HF - an acid famed for being disagreeable with glass. Discuss on Brady's subreddit: http://redd.it/2mrnyw Featuring Martyn Poliakoff and Neil Barnes. Hydrofluoric Acid and a bulb. More chemistry at http://www.periodicvideos.com/ Follow us on Facebook at http://www.facebook.com/periodicvideos And on Twitter at http://twitter.com/periodicvideos From the School of Chemistry at The University of Nottingham: http://bit.ly/NottChem Periodic Videos films are by video journalist Brady Haran: http://www.bradyharan.com/ A run-down of Brady's channels: http://bit.ly/bradychannels Music by Alan Stewart.