Mundakopanishad is associated with the Atharvaveda.It describes about Tachyons (particles that travel faster than light), Ultra-Violet band, Infra-Red band, Nuclear Energy and Black Holes in the space.
In 1st chapter, 2nd section, it has a mantra which describes seven flickering tongues of the fire(light/energy).Those are Kaali (black one), Karaali (terrific one), Manojava (swift as the mind), Sulohita (the deep red), Sudhumravarna (the smoke-coloured), Sphulligini (sparkling) and the Viswa-Rupi or the Viswaruchi (having all forms).Whoever performs his Karmas (Agnihotra etc.), when these flames are shining and in proper time, then these oblations lead him through the rays of the sun to where the one lord of the Deva dwells.
The properties described for Manojava are same as for Tachyon, which travels faster than light and its speed is equal to that of human mind.In modern science, Tachyon, (pron.: /ˈtæki.ɒn/) (term in use since 1967) is a hypothetical faster-than-light particle.In the 1967 paper that coined the term, Gerald Feinberg proposed that tachyonic particles could be quanta of a quantum field with negative squared mass.The descriptions of Sulohita is similar to Infra-red rays, of Sudhumravarna is similar to ultra-violet rays, Sphulligini same as nuclear energy and Viswaruchi same as Black Hole in space that can absorb everything.