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Often more than half of the emitted light is reflected back at the LED-package and package-air interfaces. The reflection is most commonly reduced by using a dome-shaped (half-sphere) package with the diode in the center so that the outgoing light rays strike the surface perpendicularly, at which angle the reflection is minimized. Substrates ...
David Justin Hayward [1] [2] OBE (born 14 October 1946) is an English musician. He was the guitarist and frontman of the rock band the Moody Blues from 1966 until that group's dissolution in 2018. He became the group's principal vocalist and its most prolific songwriter over the 1967–1974 period, and composed several international hit singles ...