The minimum frequency for the photoelectric effect to occur in a given metal is 5x 10^14...
The minimum frequency for the photoelectric effect to occur in a given metal is 5x 10^14 Hz.
a) Determine the metal's work function
b) If light of frequency 7.5x10^14 Hz is shined on the metal, determine the speed of the most active electron released.
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The minimum frequency for the photoelectric effect to occur in a
given metal is 5x 10^14...
In the photoelectric effect experiment, a beam of light is shining on a metal surface and the electrons are emitted from the metal. One of the three key findings is that a minimum frequency of lig...
In the photoelectric effect experiment, a beam of light is shining on a metal surface and the electrons are emitted from the metal. One of the three key findings is that a minimum frequency of light is required for emission of electrons. This minimum frequency is found to be 5.5 × 1014 s-1 for an unknown metal. 4 Briefly describe the other two findings and draw a plot fo the KE of emitted electrons against light frequency. (a) (6 marks)...
In his explanation of the threshold frequency in the photoelectric effect
In his explanation of the threshold frequency in the photoelectric effect, Einstein reasoned that the absorbed photon must have the minimum energy required to dislodge an electron from the metal surface. This energy is called the work function (Φ) of that metal. What is the longest wavelength of radiation (in nm) that could cause the photoelectric effect in each of the following metals?
Thanks! 5. (10 pts) (a) Einstein's explanation of the photoelectric effect launched the study of quantum...
Thanks!
5. (10 pts) (a) Einstein's explanation of the photoelectric effect launched the study of quantum mechanics. A minimum frequency of UV light shining on a metal is necessary to create a current. Explain in your own words, how Einstein explained this particular observation. Be to the point. Points will be deducted for answers that do not have enough detail, or if there is irrelevant information. (b) You discover a new metal. You conduct a photoelectric experiment on the metal...
The photoelectric effect demonstrates the quantized nature of light. a) What is the kinetic energy and...
The photoelectric effect demonstrates the quantized nature of light. a) What is the kinetic energy and speed of an electron ejected from a Na surface with work function 2.28 eV when illuminated by light of wavelength i) 410 nm ii) 600 nm? b) What is the critical frequency fo of incident light below which no electrons are ejected? c) Sketch a graph of kinetic energy of the ejected electron vs. frequency of incident light for the photoelectric effect in sodium....
This question has multiple parts. Work all the parts to get the most points. The energy...
This question has multiple parts. Work all the parts to get the most points. The energy of a photon needed to cause ejection of an electron from a photoemissive metal is expressed as the sum of the binding energy of the electron plus the kinetic energy of the emitted electron. When photons of 4.40x107m light strike a calcium metal surface, electrons are ejected with a kinetic energy of 1.75x10-20 J. a Calculate the binding energy of the calcium electrons. b...
Light striking a metal surface causes electrons to be emitted from the metal via the photoelectric...
Light striking a metal surface causes electrons to be emitted from the metal via the photoelectric effect.In a particular experiment to study the photoelectric effect, the frequency of the incident light and the temperature of the metal are held constant. Assuming that the light incident on the metal surface causes electrons to be ejected from the metal, what happens if the intensity of the incident light is increased?Check all that apply.The work function of the metal decreases.The number of electrons...
A metal surface has a minimum binding energy of 2.34x10-19 J/electron. An incident light of 345...
A metal surface has a minimum binding energy of 2.34x10-19 J/electron. An incident light of 345 nm wavelength was directed onto the metal. Answer the following questions: a. What is the frequency of the incident light? b. How much energy per photon is projected onto the metal surface? c. How much energy per mole is projected onto the metal surface? d. What is the kinetic energy given to one electron that is released from the metal from the photoelectric effect?...
The characteristic photoelectric threshold of a certain metal is 2750 A. Find: (a) The work necessary...
The characteristic photoelectric threshold of a certain metal is 2750 A. Find: (a) The work necessary to extract an electron from the metal; (b) The maximum speed of the photoelectrons released by light of wavelength of 1800 A; (c) The maximum kinetic energy of the photoelectrons.
Beryllium has a work function of 5.0 eV. Calculate the minimum frequency of light that would...
Beryllium has a work function of 5.0 eV. Calculate the minimum frequency of light that would eject electrons in the photoelectric effect experiment. If light of frequency 8*1015 Hz was used, what would be the maximum kinetic energy of the ejected electrons? ????max = hf - Wo I know how to calculate the maximum kinetic energy for this question using the formula above but what formula would be used to calculate the minimum frequency needed to eject the electrons? I...
10) A photoelectric effect experiment is done using light of some wavelength 2. The photoelectrons are...
10) A photoelectric effect experiment is done using light of some wavelength 2. The photoelectrons are observed to have a maximum kinetic energy of 7.0 eV. If the experiment is repeated using light of twice that wavelength (22 =221), on the same metal, it is found that the maximum electron kinetic energy is 2 eV. What is the work function of the metal?
In the photoelectric effect experiment, a beam of light is shining on a metal surface and the electrons are emitted from the metal. One of the three key findings is that a minimum frequency of light is required for emission of electrons. This minimum frequency is found to be 5.5 × 1014 s-1 for an unknown metal. 4 Briefly describe the other two findings and draw a plot fo the KE of emitted electrons against light frequency. (a) (6 marks)...
Thanks!
5. (10 pts) (a) Einstein's explanation of the photoelectric effect launched the study of quantum mechanics. A minimum frequency of UV light shining on a metal is necessary to create a current. Explain in your own words, how Einstein explained this particular observation. Be to the point. Points will be deducted for answers that do not have enough detail, or if there is irrelevant information. (b) You discover a new metal. You conduct a photoelectric experiment on the metal...
This question has multiple parts. Work all the parts to get the most points. The energy of a photon needed to cause ejection of an electron from a photoemissive metal is expressed as the sum of the binding energy of the electron plus the kinetic energy of the emitted electron. When photons of 4.40x107m light strike a calcium metal surface, electrons are ejected with a kinetic energy of 1.75x10-20 J. a Calculate the binding energy of the calcium electrons. b...
A metal surface has a minimum binding energy of 2.34x10-19 J/electron. An incident light of 345 nm wavelength was directed onto the metal. Answer the following questions: a. What is the frequency of the incident light? b. How much energy per photon is projected onto the metal surface? c. How much energy per mole is projected onto the metal surface? d. What is the kinetic energy given to one electron that is released from the metal from the photoelectric effect?...
10) A photoelectric effect experiment is done using light of some wavelength 2. The photoelectrons are observed to have a maximum kinetic energy of 7.0 eV. If the experiment is repeated using light of twice that wavelength (22 =221), on the same metal, it is found that the maximum electron kinetic energy is 2 eV. What is the work function of the metal?
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