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  • Test 1 - Electronic Devices | Electronics and Communication (ECE)
  • A particular green LED emits light of wavelength 5490°A. ...
Multiple choice

A particular green LED emits light of wavelength 5490°A. The energy bandgap of the semiconductor material used there is (Planck's constant = 6.626$\times$10-34J -s)

  1. 2.26 eV

  2. 1.98 eV

  3. 1.17 eV

  4. 0.74 eV

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