Take h to have an exact value of 6.63x10-34J-s for significant figure purposes, and use hc=1.24x103eV-nm (three significant figures). When a certain photoelectric material is illuminated with red light (A=690) and then blue light (A=410), it is found that the maximum kinetic energy of the photoelectrons resulting from the blue light is twice that from red light. Part A) What is the work function of the material? po= ? eV

Using the data from the table, what is the threshold frequency of the unidentified photosensitive surface?

The work function of a certain metal is found to be 1.82 ev. What is the stopping potential required to to stop the current in a photoelectric effect experiment if the wavelength of the incident light is 452 nm. Round your answer to 3 significant figures. Add your answer

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Calculate the maximum wavelength, Amax, of electromagnetic radiation that could eject electrons from the surface of copper, which has a work function of 7.26 x 10-1⁹ J. Amax = λ = m If the maximum speed of the emitted photoelectrons is 4.92 x 106 m/s, what wavelength of electromagnetic radiation struck the surface and caused the ejection of the photoelectrons? m

Part A What is the energy range (in joules) of photons of wavelength 390 nm to 740 nm ? Express your answers using two significant figures separated by a comma. ? Emin. Emax = J Submit Request Answer Part B What is the energy range (in eV) of photons of wavelength 390 nm to 740 nm ? Express your answers using two significant figures separated by a comma. ? Emin. Emax = eV Submit Request Answer Provide Feedback

Suppose a company wanted to develop an electricity-generating device based on the Earth as a blackbody. This temperature of 35°C at night. What would be the work function of a metal that could produce photoelectrons from the peak wavelength of the Earth's blackbody radiation at this temperature? What would be the kinetic company chose to base its operations in Death Valley, California, whose summers see a surface energy of a photoelectron produced by light half this wavelength?

What is the energy range (in joules and eV) of photons in the visible spectrum, of wavelength 410 nm to 740 nm ? Express your answers using two significant figures. Enter your answers numerically separated by a comma. ΜΕ ΑΣΦ Emin, Emax = Submit Request Answer Part B ? J Express your answers using two significant figures. Enter your answers numerically separated by a comma. Emin, Emax = Η ΑΣΦ ? eV Submit Request Answer