what is the uncertainty in energy of this excited state? What is the width of the corresponding spectral line?
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A sodium atom makes a transition from the first excited state to the ground
state, emitting a 589.0-nm photon with energy 2.105 eV. If the lifetime of this excited state is 1.6 × 10−8 s , what is the uncertainty in energy of this excited state? What is the width of the corresponding spectral line?
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- What is the wavelength, in nm, of a 1.74-eV photon? Normal format with 4 SF. Hint: 1 eV = 1.60× 10-1⁹ J.Light of wavelength 350 nm falls on a potassium surface, and the photoelectrons have amaximum kinetic energy of 1.3 eV.What is the work function of potassium?The speed of light is 3 × 108 m/s and Planck’sconstant is 6.63 × 10−34 J · s.Answer in units of eV. What is the threshold frequency for potassium?Answer in units of Hz.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?
- For light with a wavelength of 350 nm and with an intensity of /= 10-8 W/m², what is the number of photons/(m²s) in the light beam?An electron has de Broglie wavelength 2.78×10-10 m . Part A Determine the magnitude of the electron's momentum pe. Express your answer in kilogram meters per second to three significant figures. ▸ View Available Hint(s) VG ΑΣΦ 24 Pe 2.29 10 . Submit Previous Answers ? × Incorrect; Try Again; One attempt remaining kg. m/sA ball has a mass of 0.129 kg just before it strikes the Earth after being dropped from a building 36.2 m tall. What is its de Broglie wavelength? The acceleration of gravity is 9.8 m/s 2 and Planck’s constant is 6.62607 × 10−34 J · s. Answer in units of m.