Please help with my study guide I’m so lost Question 1 (4 points): Which has the

Question

Please help with my study guide I’m so lost Question 1 (4 points): Which has the shortest de Broglie wavelength? a. A free electron with a kinetic energy of 1 eV b. A free electron with a kinetic energy of 10 eV c. A free electron with a kinetic energy of 100 eV d. They all have the same de Broglie wavelength. Question 2 (4 points): In the photoelectric effecet experiment, if the frequency of incident light is increased while the intensity is unchanged, which of the following statements is true: a. The maximum photoelectron kinetic energy increases. b. The maximum photoelectron kinetic energy decreases. c. The maximum photoelectron kinetic energy remains unchanged. Question 3 (4 points): In the Davisson-Germer scattering equation, what is d? a. The wave amplitude b. The crystal atomic spacing d. The diffraction angle e. None of the above c. The wavelength s L? Question 4 (4 points): In the equation for the energy levels of a particle in a ID box, what i a. The speed of light b. The particle wavelength c. The box size d. None of the above

Explanation / Answer

Ans 1 : c) a free electron with a kinetic energy of 100 eV.

The de broglie wavelength is dependent on the mass and velocity. The higher the mass , shorter is the wavelength. Likewise greater the kinetic energy smaller is the wavelength and vice versa.

wavelength = h / mv

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