physics

posted by .

What is the minimum work function for a metal for visible light (wavelengths between 400 and 700 ) to eject photoelectrons?

  • physics -

    Does work function=hc divided by initial wavelength.

    What would the initial wavelength be? 4x10E-7 nm?

  • physics -

    The 400 nm photons would be the ones most capable of ejecting electrons. The work function you calculate with your formula will lead to the maximum work function that would allow ejection, not the minimum.

    Work function is expressed in volts. You will have to divide the photon energy by the electron charge, e.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    White light strikes a grating with 1300 lines/cm at normal incidence. How many complete visible spectra will be formed on either side of the central maximum?
  2. General Chemistry

    The photogenic work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium, this work function equals 4.34 x 10^-19 J. What is the minimum frequency of light for the photoelectric …
  3. college: Chemistry

    I need help on this homework problem and I do not understand how to work on it. Please help me with this problem. The photoelectric work function of a metal is the minimum energy needed to eject an electron by irradiating the metal …
  4. Physics

    The "work function", or the minimum energy needed to eject an electron from the metal, can be expressed in several different ways. As stated on the applet page, sodium has a work function of 2.75 eV. In class, we discussed how to determine …
  5. physical science

    Visible light consists of electromagnetic waves with wavelengths (in air) in the range 400 - 700 nm. What are the frequencies of visible light?
  6. Gen Chem

    Light of wavelength 272 nm shines on a piece of magnesium metal. What is the speed of the ejected electron?
  7. Physics

    What visible wavelengths will eject electrons from a a metal with a work function of 2.6 eV?
  8. Chemistry

    a) A sprinter must average 24.0 mi/h to win a 100-m dash in 9.30 s. What is his wavelength at this speed if his mass is 84.5 kg?
  9. Chemistry

    The photoelectric work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium, this work function equals 4.34 x 10-19 J. If light with a wavelength of 256 nm impinges …
  10. Chemistry

    The photoelectric work function of a metal is the minimum energy needed to eject an electron by irradiating the metal with light. For calcium, this work function equals 4.34 x 10-19 J. If light with a wavelength of 256 nm impinges …

More Similar Questions