Photoelectric Effect
Quick practice
Question 1 of 5
LED is constructed from Ga-As-P semiconducting material. The energy gap of this LED is 1.9 eV. Calculate the wavelength of light emitted and its colour.
[h=6.63×10–34 Js and c=3×108 ms–1]
A
1046 nm and blue colour
B
654 nm and orange colour
C
1046 nm and red colour
D
654 nm and red colour
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