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The color of the emitted light from the P-N junction made of GaAsP is

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KVS TGT WET (Work Experience Teacher) 8 Jan 2017 Official Paper
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  1. red or yellow.
  2. far infrared.
  3. near infrared.
  4. ultraviolet.

Answer (Detailed Solution Below)

Option 1 : red or yellow.
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Detailed Solution

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LED : Light emitting diode

The special diode which emits colour based on forward bias voltage.

LED with colours :

    Semiconductor                  Material         Wavelength             Colour
           GaAs       850 -950 nm          Infra Red
          GaAsP       630-660 nm              Red
        GaAsP:N       605-620 nm            Yellow
          AlGaP       550-570 nm            Green
            SiC       430-505 nm              Blue

Hence correct option is "1"

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