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Q1. The diagram shows the graphs of the stopping potential as a function of the frequency...
In the photoelectric effect, you got familiar with threshold frequency, stopping potential, and how they are...
In the photoelectric effect, you got familiar with threshold frequency, stopping potential, and how they are inter-related. The wavelength() corresponding to the threshold frequency of potassium is 558 nm. What is the work function for potassium? What is the maximum kinetic energy of e- when light of 400 nm is incident on potassium? If the intensity of light is 10-2W/m², how many photons are incident per second per square meter? (4 points)
Which of the following statements is correct for photoelectric effect? (A) In order to eject electrons...
Which of the following statements is correct for photoelectric effect? (A) In order to eject electrons from a metal surface, the wavelength of photon must be shorter than the threshold wavelength. (B) In order to eject electrons from a metal surface, the frequency of photon must be lower than the cut-off frequency. (C) The work function increases with increasing the frequency of photons. (D) The work function increases with increasing the wavelength of photons. (E) The kinetic energy of ejected...
In a photoelectric effect experiment at a frequency above cut off, the number of electrons ejected...
In a photoelectric effect experiment at a frequency above cut off, the number of electrons ejected is proportional to: A) their kinetic energy B) their potential energy C) the work function D) the frequency of the incident light E) the number of photons that hit the sample Which of the followings can increase the kinetic energy of each emitted electrons? I. Increase the light frequency but keep the intensity fixed ll. Increase the light intensity but keep frequency fixed Ill....
Light of intensity 2 μW.cm-2 is incident on an iron sample of area 4 cm 2...
Light of intensity 2 μW.cm-2 is incident on an iron sample of area 4 cm 2 . Assume that the iron reflects 96% of the incident light and only 3% of the absorbed radiation lie in the violet region, which is above the critical/threshold frequency. (a) What intensity is available for the photoelectric effect ? (b) Assuming that all the photons in the violet region have an effective wavelength of 250nm, what is the number of electrons emitted per second?...
The following data gives stopping potential Vo versus wavelength for photoelectrons produced from a metal surface....
The following data gives stopping potential Vo versus wavelength for photoelectrons produced from a metal surface. (Be sure to include the correct units and use three significant figures.) Table 1 2 Vo (nm) (volts) 50 21.1 100 9.27 150 5.17 3.14 200 250 1.83 300 1.02 Use an analysis similar to that used in the inlab procedure to determine the work function in eV) for this surface. (Use 1 eV = 1.602 x 10-19), e = 1.602 x 10-19 C,...
Question (2) Choose the correct answer. Justify your answer In a photoelectric experiment, the stopping potential...
Question (2) Choose the correct answer. Justify your answer In a photoelectric experiment, the stopping potential is 1 V, the work function is 2 eV. The intensity of the incident light is doubled and the frequency reduces to half its initial value. Answer the following two questions 1) In this new situation, the work function of the cathode is: a) 4 eV b) 2 eV l eV d) 6 eV e) 3 eV In this new situation, the saturation current:...
Question 1 (1 point) If light with a frequency below the cutoff frequency for a certain...
Question 1 (1 point) If light with a frequency below the cutoff frequency for a certain metal hits that metal: Question 1 options: electrons will be ejected after the intensity of the light reaches a certain value no electrons will be ejected electrons will be ejected, but will fall back to the metal the light will be re-radiated by the metal I don't know. Question 2 (1 point) One electron-volt is equivalent to Question 2 options: 1 J 1 V...
In the photoelectric effect, you got familiar with threshold frequency, stopping potential, and how they are inter-related. The wavelength() corresponding to the threshold frequency of potassium is 558 nm. What is the work function for potassium? What is the maximum kinetic energy of e- when light of 400 nm is incident on potassium? If the intensity of light is 10-2W/m², how many photons are incident per second per square meter? (4 points)
In a photoelectric effect experiment at a frequency above cut off, the number of electrons ejected is proportional to: A) their kinetic energy B) their potential energy C) the work function D) the frequency of the incident light E) the number of photons that hit the sample Which of the followings can increase the kinetic energy of each emitted electrons? I. Increase the light frequency but keep the intensity fixed ll. Increase the light intensity but keep frequency fixed Ill....
The following data gives stopping potential Vo versus wavelength for photoelectrons produced from a metal surface. (Be sure to include the correct units and use three significant figures.) Table 1 2 Vo (nm) (volts) 50 21.1 100 9.27 150 5.17 3.14 200 250 1.83 300 1.02 Use an analysis similar to that used in the inlab procedure to determine the work function in eV) for this surface. (Use 1 eV = 1.602 x 10-19), e = 1.602 x 10-19 C,...
Question (2) Choose the correct answer. Justify your answer In a photoelectric experiment, the stopping potential is 1 V, the work function is 2 eV. The intensity of the incident light is doubled and the frequency reduces to half its initial value. Answer the following two questions 1) In this new situation, the work function of the cathode is: a) 4 eV b) 2 eV l eV d) 6 eV e) 3 eV In this new situation, the saturation current:...
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