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A particular green LED emits light of wavelength 5490, Å, the energy bandgap of the semiconductor material used there is .. h = 6.6 x 10-34 J sec. | |
A. | 2.26 eV [Correct Answer] |
B. | 1.98 eV [Wrong Answer] |
C. | 1.17 eV [Wrong Answer] |
D. | 0.74 eV [Wrong Answer] |