A) 1000 nm
B) 1703 nm
C) 500 nm
D) 173 nm
Correct Answer: B
Solution :
Limiting value of hn is Eg, such that \[h\nu =\frac{hc}{\lambda }={{E}_{g}}\] or \[\lambda =\frac{hc}{{{E}_{g}}}\]\[=\frac{6.63\times {{10}^{-34}}J\text{-}s\times 3\times {{10}^{8}}m{{s}^{-1}}}{0.73\times 1.6\times {{10}^{-19}}J}\] = 1703 nm
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