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I got to know that the threshold voltage for an LED is different for LEDs emitting different colors. I don't actually know the reason. I searched everything from the Web but didn't get that... Kindly help. Just gimme a hint or clue.

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    $\begingroup$ Okay, here's a hint: a LED emitts its color depending on the semiconductor it is made of, and that's because each semiconductor has its own band structure. A higher gap implies more energy to reach the conduction band. Since $E=h \nu$, it will have a higher frequency. In other words, different colors = different gap energies. $\endgroup$
    – FGSUZ
    Commented Jan 21, 2018 at 14:21
  • $\begingroup$ And it cleared it! yeah! i love ya! thanks @FGSUZ... and i got it.... ! what you missed and hide! i grasped it....! thanks again $\endgroup$
    – Selena
    Commented Jan 21, 2018 at 14:26

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