Question

calculate the velocity of electron ejected from platinum surface when radiation of 200nm falls on it. work function of platinum is 5 eV (1 eV=1.6×
${10}^{ - 19}$
)​

Answer 1

Explanation:

Wavelength of radiation

<br>

<br>

<br> Work function

<br> Energy of photons<br>

<br>

<br>

<br> Using Einstien's photoelectric equation <br>

<br> or

<br>

<br>

<br>

<br> or

<br>