A photodiode has a rating of s = 1200 nm. What is the optimum operating frequency for the device?
A) 250 THz
B) 400 THz
C) 250 × 1021 Hz
D) 120 THz

Question

Quizplus · Accepted Answer

The optimum operating frequency for a photodiode can be calculated using the formula $f = \frac{c}{\lambda}$, where $c$ is the speed of light ($3 \times 10^8$ m/s) and $\lambda$ is the wavelength in meters. For a wavelength of 1200 nm (or $1200 \times 10^{-9}$ m), the frequency $f = \frac{3 \times 10^8}{1200 \times 10^{-9}} = 250 \times 10^{12}$ Hz, which is 250 THz.

A Photodiode Has a Rating of S = 1200 Nm