A photoelectric surface has a work function of 2.10 eV. Calculate the maximum kinetic energy, in eV, of electrons ejected from this surface by electromagnetic radiation of wavelength 356 nm.  

 2)(Note: h = 6.63 x 10-34 J ? s, e = 1.60  10-19 C, and c = 3.00 x 108 m/s.) 

X-rays of energy 3.5 x 104 eV are Compton-scattered through an angle of 105. What is the energy of the scattered X-rays, in electron volts? (Note: h = 6.63  10-34 J ? s, c = 3.00  108 m/s, e = 1.60  10-19 C, and the mass of the electron is 9.11  10-31 kg.) 

When a photoelectric surface is illuminated with light of wavelength 437 nm, the stopping potential is 1.67 V. 

 

 (a)What is the work function of the metal in eV? 

 

 (b)What is the maximum speed of the ejected electrons? 

 

 (Note: h = 6.626  10-34 J ? s, me = 9.110 x 10-31 kg, e = 1.602  10-19 c) 

 

 

 

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