Physics · Semiconductor Devices
An LED is constructed from a Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of light emitted and identify its colour. (Take h = 6.63 × 10-34 J-s and c = 3 × 108 m/s)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 11046 nm and blue colour
- 21046 nm and red colour
- 3654 nm and orange colour
- 4654 nm and red colour✓
Correct answer
654 nm and red colour
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