Question
Question: The electrical conductivity of a semi conductor increases when electronmagnetic radiation of wave le...
The electrical conductivity of a semi conductor increases when electronmagnetic radiation of wave length shorter than 2480 nm is incident on it. The band gap (in eV) for semiconductor is
A
0.9
B
0.7
C
0.5
D
1.1
Answer
0.5
Explanation
Solution
: Eg=λhc=2480nm1240eVnm=0.5eV