Physics · 2014
JEE Main · 12 April 2014, Shift 1 · Q28
For LED's to emit light in visible region of electromagnetic light, it should have energy band gap in the range of:
For LED's to emit light in visible region of electromagnetic light, it should have energy band gap in the range of :
Official answer
(4)
1.$\displaystyle 7$ eV to $\displaystyle 3.0$ eV
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JEE Main 2014 Physics question, with the answer from NTA’s final answer key. Where our answers come from.