A device called a photocell detects light by letting it fall onto a metal and then...
A device called a photocell detects light by letting it fall onto a metal and then measuring the current from the ejected electrons. You are designing a photocell to work with visible light and are considering the use of either molybdenum (work function = 4.2 eV) or sodium(work function = 2.4 eV).
What is the lowest photon frequency that can be detected with your photocell?
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A device called a photocell detects
light by letting it fall onto a metal and then...
Sodium metal has a work function of 2.28 eV. (a) At what wavelength of incident light...
Sodium metal has a work function of 2.28 eV. (a) At what wavelength of incident light will electrons be ejected from the material? (b) If light of wavelength 450 nm is incident on the sodium, determine the maximum kinetic energy of the ejected electrons 13.4
Light of wavelength 400 nm is incident on a metal surface. The stopping potential for the...
Light of wavelength 400 nm is incident on a metal
surface. The stopping
potential for the resulting electrons is 0.91 V.
a) What is the work function of the metal?
b) Identify the metal. (Use the Table)
c) What is the cut-off frequency for this target?
76 Chapter 3 Waves and Particles 1: Electromagnetic Radia TABLE 3.1 Metal Work Function in eV) Cesium Potassium Sodium Magnesium 19 2.2 2.3 3.7 are ejected if the intensi surable time might be ne...
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...
hf = + (1/2) mv2 and hf = + eVs work fucntion...
hf = + (1/2) mv2 and hf = + eVs work fucntion e = 1.60 x 10-19 C, h = 6.63 x 10-34 J s, m- mass of electron = 9.11 x 10-31 kg 1. The work function for lithium is 4.6 x 10-19 J. (a) Calculate the lowest frequency of light that will cause photoelectric emission. (b) What is the maximum energy of the electrons emitted when a light of 7.3 x 1014 Hz is...
9. Consider green light with a wave length of 530 nanometers (nm). a) What...
9. Consider green light with a wave length of 530 nanometers (nm). a) What is its frequency in Hz? b) What is the energy (in Joules) of a single photon? c) Suppose you shine the green light on metallic sodium with a work function of 2 eV. Will you see ejected electrons? What will be their kinetic energy? (Recall that 1eV is equivalent to 1.6 *10^-19Joules.)
1. If light with a frequency below the cutoff frequency for a certain metal hits that...
1. 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. 2. One electron-volt is equivalent to Question 2 options: 1 J 1 V 1.6 x 10^-19 J 1.6 x...
just letter suffice . all 4 qs photon with a frequency of 2.5 x 1015 Hz strikes the surface of a metal. If the can be stopped by a voltage of 3.0 v, the work function of the metal is 41) An Ultrav...
just letter suffice . all 4 qs
photon with a frequency of 2.5 x 1015 Hz strikes the surface of a metal. If the can be stopped by a voltage of 3.0 v, the work function of the metal is 41) An Ultraviolet electrons that are ejected be a. 5.3 eV and the photon has an energy o b. 8.2 eV and the photon has an energy of 1.3 x 10s Joules c. 5.3 eV and the photon has an...
Sodium metal has a work function of 2.28 eV. (a) At what wavelength of incident light will electrons be ejected from the material? (b) If light of wavelength 450 nm is incident on the sodium, determine the maximum kinetic energy of the ejected electrons 13.4
Light of wavelength 400 nm is incident on a metal
surface. The stopping
potential for the resulting electrons is 0.91 V.
a) What is the work function of the metal?
b) Identify the metal. (Use the Table)
c) What is the cut-off frequency for this target?
76 Chapter 3 Waves and Particles 1: Electromagnetic Radia TABLE 3.1 Metal Work Function in eV) Cesium Potassium Sodium Magnesium 19 2.2 2.3 3.7 are ejected if the intensi surable time might be ne...
just letter suffice . all 4 qs
photon with a frequency of 2.5 x 1015 Hz strikes the surface of a metal. If the can be stopped by a voltage of 3.0 v, the work function of the metal is 41) An Ultraviolet electrons that are ejected be a. 5.3 eV and the photon has an energy o b. 8.2 eV and the photon has an energy of 1.3 x 10s Joules c. 5.3 eV and the photon has an...
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