krypton light
21Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
22Gas-discharge lamp — See also: Gas filled tube Germicidal lamps are simple low pressure mercury vapor discharges in a fused quartz envelope. Gas discharge lamps are a family of artificial light sources that generate light by sending an electrical discharge through an …
23Gas-filled tube — See also: Gas discharge lamp A gas filled tube, also known as a discharge tube, is an arrangement of electrodes in a gas within an insulating, temperature resistant envelope. Although the envelope is typically glass, power tubes often use… …
24Powers and abilities of Superman — The powers of DC Comics character Superman have changed a great deal since his introduction in the 1930s. The extent of his powers peaked during the 1970s and 1980s to the point where various writers found it difficult to create suitable… …
25Characters of Smallville — The season four cast (clockwise from left) Allison Mack, John Glover, Erica Durance, Jensen Ackles, Annette O Toole, John Schneider, Michael Rosenbaum, Tom Welling and Kristin Kreuk contains the characters who have been on the show the longest,… …
26Metre — This article is about the unit of length. For other uses of metre or meter , see meter (disambiguation). 1 metre = SI units 100 cm 1000 mm US customary / Imperial units 3.2808 ft 39.370 in The metre (or meter), symbol m, is… …
27List of Legion of Super-Heroes members — The Legion of Super Heroes is a team of comic book superheroes in the future, as published by DC Comics. It has gone through various iterations, as well as two separate reboots. Contents 1 Original team (1958–1994) 1.1 Founding members 1.2 …
28The Death of Superman — Cover of Superman vol. 2, 75 (Jan 1993). Art by Dan Jurgens Brett Breeding. Publisher DC Comics …
29List of minor DC Comics characters — Throughout its history, DC Comics has introduced many, many characters. Most of them have been minor characters. These characters range from supporting characters, heroes, and/or villains that appear infrequently to those that only take part in a …
30Supergirl — This article is about the superhero. For other uses, see Supergirl (disambiguation). Supergirl Various incarnations of Supergirl (from left to right): Original Kara Zor El, Matrix, Kara in the 70s, Modern Kara, Linda Danvers, Power Girl, and Kara …
