The work function of Na is 2.3eV. What is the longest-wavelength light that can cause photoelectron emission from Na? What color is this?

The work function of Na is 2.3eV. What is the longest-wavelength light that can cause photoelectron...
What is the longest wavelength of light that can cause the release of electrons from a metal that has a work function of 3.40 eV ?
Copper has a work function (Φ) of 4.70 eV. What is the longest wavelength of light that will cause the ejection of electrons in nm? (1 eV=1.6 × 10⁻¹⁹ J)
What is the longest-wavelength EM radiation in nm) that can eject a photoelectron from zirconium, given that the binding energy is 4.05 eV? nm Is this in the visible range? Yes No Additional Materials Reading
Zink has a work function of 4.3 eV . What is the longest wavelength of light that will release an electron from a zink surface? A 4.6 eV photon strikes the surface of zink and an electron is emitted. What is the maximum possible speed of the electron?
Problem 4: What is the maximum photoelectron speed if sodium of work function 2.75 eV is illuminated with the light of wavelength 300 nm. Find the de Broglie wavelength and momentum of such photoelectron
What is the longest wavelength of a photon that can cause the dissociation of an H2 molecule ? Type your answer here: nm
A surface whose work function is 1.8 eV is illuminated by a light whose wavelength is 167 nm. What is the maximum velocity of a photoelectron emitted from the surface? The speed of light is 3 × 108 m/s and Planck’s constant is 6.63 × 10−34 J · s.
What is the longest wavelength of a photon that can cause the dissociation of the O-O bond in ozone ? Type your answer here: nm
What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the first excited state?
The work function (Φ) for a metal is 7.80×10-19 J. What is the longest wavelength of electromagnetic radiation that can eject an electron from the surface of a piece of the metal?