Topic: Electronic Devices and Circuits
The wavelength of emitted radiation by electron while transiting from one energy state of -15 eV to other energy state of -5 eV is
- A. 1000 Å
- B. 1240 Å
- C. 1280 Å
- D. 1300 Å
Answer: B. 1240 Å
Explanation: The energy gap $E_G = -5 - (-15) = 10~\text{eV}$.
Wavelength $\lambda = \frac{1.24}{E_G}~\mu\text{m} = \frac{1.24}{10} \times 10^{-6}~\text{m} = 0.124~\mu\text{m} = 1240~\text{Å}$.