Electronics and Communication Engineering - Electronic Devices and Circuits - Discussion

Discussion Forum : Electronic Devices and Circuits - Section 3 (Q.No. 45)

Electronic Devices and Circuits

45.

GaAs has an energy gap 1.43 eV the optical cut off wavelength of GaAs would lie in the

visible region of the spectrum

infrared region of the spectrum

ultraviolet region of the spectrum

for ultraviolet region of the spectrum

Answer: Option

Explanation:

GaAs has very large band gap and high carrier mobility.

Discussion:

2 comments Page 1 of 1.

MANOJ said: 7 years ago

How? Explain the answer.

ADC said: 3 years ago

Energy=(h*c)/wavelength. h*c=1.98644586 * 10-25 m^3 kg / s^2. Put these values and calculate the wavelength. It will be in the range of infrared.

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