2 years ago

Difference between rest and motion

1 answer:

3 0

Rest - it is the state in which body doesn’t move from it’s place

motion - it is the state in which body moves from it’s place

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The maximum wavelength that an electromagnetic wave can have and still eject electrons from a metal surface is 542 nm. What is t

Veseljchak [2.6K]

Answer:

2.295 eV

Explanation:

maximum wavelength, λ = 542 nm = 542 x 10^-9 m

The work function of the metal is defined as the minimum amount of energy falling on the metal so that the photo electrons just ejects the surface of metal.

$W_{o}=\frac{hc}{\lambda }$

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h = 6.634 x 10^-34 Js

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$W_{o}=\frac{6.634\times 10^{-34}\times 3\times 10^{8}}{542\times10^{-9} }$

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Thus, the work function of this metal is 2.295 eV.

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2 years ago

Difference between rest and motion​

Difference between rest and motion