Find Relative error for the find planck constant:  h = (1.60217662 x 10^-19)(4.1628 10^-6 ±1.25718 10^-7)/(299792458)

A photon of wavelength 344 nm carries a relativistic mass of (Given Planck's constant = 4.1357 x 10-15 eV s = 6.6261 x 10-34 J s, speed of light = 3 x 1010 cm/s): а) 6.4 х 10-36 g b) 6.4 x 10-33 g 4.0х 10-17 g d) 4.0 x 10-14 g e) None of the above

A typical x-ray has a frequency of 3x10*17 Hz. What is the wavelength?

If the wavelength of an electron is 4.58 ✕ 10−7 m, how fast is it moving? km/s(b) If the electron has a speed equal to 3.80 ✕ 106 m/s, what is its wavelength? m

3.1. What is the de Broglie wavelength of an electron that has been accelerated through a potential difference of AV = 150 V?

The quantum state of an electron in an atom is described by quantum numbers n = 6, ℓ = 5, and mℓ = 2. The z-component orbital angular momentum of the electron is measured to be x × h/2π, where h is Planck’s constant. What is the number x (remember to use the scientific notation)?

A certain shade of blue has a frequency of 7.07 × 10¹4 Hz. What is the energy of exactly one photon of this light? Planck's constant is h = 6.626 × 10-34 J.s. E =

= 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.

You set up a photoelectric experiment with an unknown metal to eject electrons. You use light of wavelength λ = 660 nm, which just BARELY ejects electrons from the metal. Planck s constant is either h = 6.63 x 10-34 J.s or h = 4.14 x 10-15 ev.s. a) What is the binding energy of the unknown metal in eV? eV b) You change the light source to one with a wavelength of λ = 300 nm. Using the binding energy you found in the previous step, find the maximum kinetic energy of an electron that is ejected from the metal in Joules. c) What is the stopping voltage for an electron with the kinetic energy you just found? Submit Answer