A a) A clean Nickel surface is exposed to light of wavelength 235 nm. What is the maximum speed of the photoelectrons emitted from this surface? (Work function of Nickel is 5.1eV). b) Convert (3.79eV) in to joules.

UV radiation having a wavelength of 146 nm falls on gold metal, to which electrons are bound by 4.82 eV. What is the maximum velocity of the ejected photoelectrons? No need to use relativistic formulas in this case.

Calculate the de Broglie wavelength (in fm) of a 5.8 MeV a particle emitted from an atomic nucleus whose diameter is approximately 1.6 × 10¯14, fm Calculate its minimum kinetic energy (in keV) according to the uncertainty principle. keV Could this particle exist inside the nucleus? Yes No Explain. m.

MerCadTel devices are like digital cameras, but for infrared radiation.a) Suppose you observe an object using a wavelength of 5 microns (5e-6m). What is theenergy of these photons?b) If the work function of the MerCadTel substrate (the detector surface) is 0.13eV, whatis the kinetic energy of the electron that is liberated from the detector?c) What is the De Broglie wavelength of the liberated electron? The mass of the electronis 9.1e-31kg, 1 eV=1.6e-19 J, and h = 6.626e-34 Js. Hint: The electron is not movingrelativistically.

A) Astronomers measure the peak wavelength of a nearby star to be 410 nm. What is the star's temperature? B) How much energy does a single photon of light have at this wavelength? C) An electron bound in an unknown metal requires 1.45E-19 ] of energy under the photoelectric effect to become free of the metal. How much kinetic energy would it have if struck by the photon froft part (b)? D) What is the final speed of the elctron from part (c)?

QUESTION 24 When ultraviolet light with a wavelength of 317 nm falls on a certain metal surface, the maximum kinetic energy of the emitted photoelectrons is measured to be 1.76 x 10-1 J. How much energy, in Joule, does an electron have to gain in order to escape from the metal surface? Exponential format with 3 SF.