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A photodiode is fabricated with band gap of 3 eV. It can detect |
Visible light Microwave Infrared radiation X-rays |
Visible light |
The correct answer is Option (1) → Visible light For detection of light by photodiode $E \leq \frac{h c}{\lambda}$ $3 \mathrm{eV} \leq \frac{12400}{\lambda}$ $\lambda \leq \frac{12400}{3} \Rightarrow \lambda \leq 4130 Å$ The photodiode can detect the light lying in visible region (partially) and of ultraviolet region. |