Question 2 Which material would you choose for the photocathode in a photomultiplier tube that is designed to operate using 1000 nm infrared light?

Question

Question 2 Which material would you choose for the photocathode in a photomultiplier tube that is designed to  operate using 1000 nm infrared light?

Answer

Strontium oxide (work function = 1.6 eV)

Answer

Barium oxide (work function = 1.1 eV)

Answer

Thoriated tungsten (work function = 2.6 eV)

Answer

Tungsten (work function = 4.5 eV)

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