What is the wavelength, in nm, of a 1.73-eV photon? Normal format with 4 SF. Hint: 1 eV=1.60× 10-19J.
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- Light with a wavelength of 270 nm is incident on a metal surface and ejects electrons with a maximum kinetic energy of 1.2 eV. What is the work function, ø, of the surface? а. 3.4 eV. b. 1.2 еV. c. 2.5 eV. d. 5.8 eV. е. 3.8 eV.Suppose an argon laser emits 1.49 * 1019 photons per second,half with a wavelength of 488.0 nm and half with a wavelength of514.5 nm. What is the power output of this laser in watts?A. 1.49 W B. 5.76 WC. 5.92 W D. 6.07 WMY NOTES ASK YOUR TEACHER PRACTICE ANOTHER A solid metal sphere emits 1.62 x 1020 photons every second with a radiating power of 1.93 W. (a) Determine the energy associated with each photon. eV (b) Assuming the sphere's power output is associated with the peak wavelength, determine the temperature of the sphere at which this wavelength is emitted. K Additional Materials O Reading
- Magnesium has a work function of 3.7 eV. A.) What is the longest wavelength of light that will release an electron from a magnesium surface?Help with a iv, b and cB4. A bone sample has a density p = 1.2x10³ kg/m³, a molar mass m = 217 g/mol and an interaction cross section per atom o = 6.0x10-22 cm². Determine the linear attenuation coefficient µ (in cm-¹) and the half value layer (in cm). Assume there is no scattering when the radiation interacts with the bone sample. Express the values to 3 significant figures, if necessary.