Physics

Watch the videos below: https://www.youtube.com/watch?v=eO6JaaBhn-M&feature=youtu.be https://www.youtube.com/watch?v=ubkNGwu_66s&feature=youtu.be 5. Calculate the frequency (f) for that wavelength and record it in" rel="nofollow">in the table below. Remember that c=λf, where c is the speed of light (3 * 10^8 m/s). 6. Calculate the Energy (E) in" rel="nofollow">in joules for that wavelength and record it in" rel="nofollow">in the table below. Remember that E = hf, where h the Planck constant (6.6 *10^-34 j*s) 7. Complete the Energy (E) in" rel="nofollow">in electro-volt (ev) and record it in" rel="nofollow">in the table below. 1 electron-volt (eV) = 1.6 X 10-19 J 8. Repeat the above step for each of the metals under the pull down menu. Metal Wavelength λ (nm) Frequency f (Hz) Energy E (J) Energy (eV) Sodium Zin" rel="nofollow">inc Copper Platin" rel="nofollow">inum Calcium 9. The min" rel="nofollow">inimum frequency of a photon that can eject an electron from a surface is called the threshold frequency, ft. What is the threshold frequency, ft, for each of the metals? HINT: revisit in" rel="nofollow">instructions 3 & 4. Metal Threshold Frequency ft (Hz) Sodium Zin" rel="nofollow">inc Copper Platin" rel="nofollow">inum Calcium 10. The min" rel="nofollow">inimum amount of energy required for an electron to escape from a metal is called the work function (W) and is given by the equation W = hft. What is the work function for each of the metals in" rel="nofollow">in joules and electron-volts? HINT: revisit in" rel="nofollow">instructions 3 to 6. Metal Work Function E (J) Work Function E (eV) Sodium Zin" rel="nofollow">inc Copper Platin" rel="nofollow">inum Platin" rel="nofollow">inum Calcium 11. Make the followin" rel="nofollow">ing additional adjustments to the simulation. • Check the box “current vs. light in" rel="nofollow">intensity”. • Check the box “electron energy vs. frequency” • Select the Sodium. • Use violet light (about 400 nm). • Vary the in" rel="nofollow">intensity of the light and observe any changes in" rel="nofollow">in the number of ejected electrons. 12. What’s the relationship between the in" rel="nofollow">intensity of the in" rel="nofollow">incident light and the number of the ejected electrons? 13. What’s the relationship between the in" rel="nofollow">intensity of the in" rel="nofollow">incident light and the energy of the ejected electrons?