1 shows a white-light LED in action ... thereby creating light of a colour corresponding to the energy gap between the conduction band and valence band, also called the bandgap.

Led Zeppelin were, for a time ... of one of the most exciting groups in rock history, and it channels the band's energy "beautifully".

“I don't know if you can imagine music without Led Zeppelin,” Brolan said. “They just brought so much originality and power and energy and style. I can't imagine there's a rock band since ...

While the "untold story" is steered by the band members' anecdotes ... and points out why Led Zeppelin's "kinetic energy" remains vital: "Led Zeppelin are not best mates; it's really obvious ...

showing fans more about the band's creativity. This album established a solid groundwork and high standard for their subsequent endeavors. The compositions and energy of the album cemented Led ...