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A physicist wishes to eject electrons by...

A physicist wishes to eject electrons by shining light on a metal surface. The light source emits light of wavelength of 450 nm. The table lists the only available metals and their work functions.
`{:("Metal",W_(0)(eV)),("Barium",2.5),("Lithium",2.3),("Tantalum",4.2),("Tungsten",4.5):}`
Which metal(s) can be used to produce electrons by the photoelectric effect from given source of light?

A

Barium only

B

Barium or lithium

C

Lithium, tantanlum ot tungsten

D

Tungsten or tantalum

Text Solution

Verified by Experts

The correct Answer is:
B
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