- Learning Goal Photoelectric Effect Figure 1 The Work Function Of Calcium Metal Is Wo 2 71 Ev Use H 6 626x10 34 J 1 (27.47 KiB) Viewed 42 times
Light Light 2 Neo Photo- electrons KE-N-W. +++ Photoelectric Effect Lenard found that light has to be above a certain frequency in order to observe photoelectrons fo
Photoelectric Effect - Calculations 3 (Suggestion self-assessment) The work function of calcium meter is W = 2.71 eV Use h = 6.626x10-34 J .s for Planck's constant and c = 3.00x10 m/s for the speed of light and express your answer in electron volts. 1 electron volt (eV) = 1.6 X 10-19 J. Part A - What is the cutoff frequency of the incident light for calcium? Use scientific notations, format 1.234*10": unit is Hz ΡΕΙ ΑΣφ ? for Hz Submit Request Answer Part B - What is the longest wavelength of the incident light that can emit photoelectrons from calcium metal surface? Enter a regular number with 1 digit after the decimal point, in nm. 1nm = 10m VO AXO ? Jo = nm Submit Request Answer
Now an incident light of unknown wavelength shines on a calcium meter surface. The max speed of 9.11x10-31 kg photoelectrons is v = 3.252x105 m/s .Use the classical physics formula for KE = mu?. The mass of an electron is m = - Part C- What is the max kinetic energy of the photoelectrons? Use scientific notations, format 1.234*10- unit is Joules ΟΙ ΑΣΦ 2 KE Submit Request Answer Part D - What is the photon energy in the incident light? Use scientific notations, format 1.234'10"- unit is Joules VIAE h photon energy E- J Submit Request Answer Part E - What is the wavelength of the incident light? Enter a regular number with 1 digit after the decimal point, in nm. Inm-10-9m νΠ ΑΣφ to ? 7771 Submit Request Answer