Question

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❇✔✔❇calculate the value of longest wavelength which can result in emission of photoelectrons from a sodium surface❇✔✔❇
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Answer 1

Longest wavelength means minimum energy.

So you need to know the work function of
sodium for the calculation as work function is the minimum energy to remove a photoelectron from a metal and varies as the substance changes.

After you know the value of work function in Joules then equate it with hc/lambda as we need the wavelength for the minimum energy.

Now calculate the lambda and that will be your answer.

Answer 2

Answer:

Longest wavelength means minimum energy.

So you need to know the work function of

sodium for the calculation as work function is the minimum energy to remove a photoelectron from a metal and varies as the substance changes.

After you know the value of work function in Joules then equate it with hc/lambda as we need the wavelength for the minimum energy.

Now calculate the lambda and that will be your answer.

Explanation: