AP EAMCET Engineering 21 Apr 2019 Shift 1 Paper

Section: Physics

Question : 119 of 160

Marks: +1, -0

For an LED to emit light in visible region of electromagnetic spectrum, it can have energy band gap in the range of
(Plank’s constant = 6.6 × 10−34 J - s and speed of light = 3 × 108ms−1 in vacuum)

0.1 eV to 0.4 eV
0.9 eV to 1.6 eV
1.7 eV to 3.1 eV
0.5 eV to 0.8 eV

Validate

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