Question
Physics Question on Semiconductor electronics: materials, devices and simple circuits
Three phtodiodes D1, D2, D3 are made of semiconductors having band gaps of 2.5 eV, 2 eV and 3 eV respectively. Which one will be able to detect light of wavelength 600 nm?
A
D1 only
B
Both D1 and D3
C
D2 only
D
All the three diodes
Answer
D2 only
Explanation
Solution
The correct answer is (C) : D2 only.