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 metal and their work functions- begin matrix Metal - W - 0 eV Barium -2-5 11Lithium - 2-3 1Tantalum- 4-2 1 Tungsten- 4-5 lend matrix Which metals can be used to produce electrons by the photoelectric effect from given source of light-A- Barium onlyB- Barium or lithiumC- Lithium- tantalum or tungstenD- Tungsten or tantalum

The correct option is B Barium or lithiumΔ E=12400/4.500Ȧ Δ =2.75 eV For photoelectric effect, Δ E gt; W_0 (work function). ...

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Standard XII

Chemistry

S Block Elements

A physicist w...

Question

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 metal and their work functions.
$\begin{matrix} M e t a l & W_{0} (e V) B a r i u m & 2.5 L i t h i u m & 2.3 T a n t a l u m & 4.2 T u n g s t e n & 4.5 \end{matrix}$
Which metal(s) can be used to produce electrons by the photoelectric effect from given source of light?

Barium only

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Barium or lithium

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Lithium, tantalum or tungsten

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Tungsten or tantalum

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Solution

The correct option is B Barium or lithium
$Δ E = \frac{12400}{4.500 ˙ A}$
$Δ = 2.75 e V$
For photoelectric effect, $Δ E > W_{0}$ (work function).

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Similar questions

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 metal and their work functions.
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Q. Which metal(s) can be used to produce electrons by the photoelectric effect from given source of light ?

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The correct option is B Barium or lithiumΔE=124004.500˙A Δ=2.75eV For photoelectric effect, ΔE>W0 (work function).

The correct option is B Barium or lithium
$Δ E = \frac{12400}{4.500 ˙ A}$
$Δ = 2.75 e V$
For photoelectric effect, $Δ E > W_{0}$ (work function).