In an experiment designed to measure the charge-to-mass ratio of the electron, electrons are accelerated from rest through a potential difference of 2000 volts. Wwhat is the de Broglie wavelength of each of these electrons? m

The wavelength of a red spectral emission line is 670.0 nm. At what kinetic energy (in J) would an electron have that wavelength as its de Broglie wavelength?

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.

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/s

An isolated atom of certain element emits light of wavelength 529 nm when the atom falls from its sixth excited state into its third excited state. The atom emits a photon of wavelength 422 nm when it drops from its seventh excited state into its third excited state. frind wavelength of the light radiated when the atom makes a transition from its seventh to its sixth excited state, in um. a. 21 b. 2.09 c. 2086.34 d 0.0209 e. 208. 63

a) For photon, electron and neutror, each having energy E = SD₂V = 50 (1.602 x 10+9y), calculate the de Broglie wavelengths and the frequency of an 6) calculate the de Broglie wavelength of a baseball 0.150kg moving at of weight 150g 100 mph. ( SVA

Electrons striking the back of a conventional TV screen travel at a speed of about 2.7 ✕ 107 m/s. What is their de Broglie wavelength (in nm)?

A particle of matter is moving with a kinetic energy of 7.53 eV. Its de Broglie wavelength is 2.85 x 10^-12 m. What is the mass of the particle?

= 1. Photoelectric effect. In a photoelectric experiment in which monochromatic light of wave- length \ falls on a potassium surface, it is found that the stopping potential Vstop is 1.9 V for > 300 nm and 0.88 V for \ = 400 nm. Imagine we know neither Planck's constant, nor the workfunction for potassium, nor the threshold frequency fo. But assume we do know the elementary charge e 1.60 × 10-19 C and want to test the theoretical prediction of Eintsein's theory. = (a) From the given data, calculate a value for Planck's constant, h. (b) From the same data, find the workfunction Eo and the threshold frequency fo for potas- sium. (c) Then compare your results for h and Eo to their known values (see Knight, Table 38.1 for the work function). (d) Plot eVstop as a linear function of frequency f. Include the information you have found in parts (a) and (b) as well as the experimental data.