Discuss the below:
Q1. According to the classical theory of physics, the energy radiated by a blackbody approached infinity as the wavelength of the emitted light approaches zero.
a) Why is this considered a problem for classical physics?
b) Max Planck solved this problem is 1990. What was the key to the solution?
c. How does Planck's assumption solve the "ultraviolet catastrophe"?
Q2. A ringing bell oscillates at 440 Hz.
a. How much energy (in joules) is carried away in a one-quantum change of this system?
b. Convert your answer to units of electron-volts.
Q3. The equation for the maximum kinetic energy of an ejected photo-electron is KErnax= hf - hft
a. Rearrange this equation to solve for the work function.
b. If photoelectrons with 235 eV of maximum kinetic energy are observed when a 1.17 x 1015 Hz light is used, find the work function of the metal.
1. Write a brief description of Rutherford's model of the atom.
2. Why was Rutherford surprised that some of the alpha particles were scattered backwards?
3. Even though some atoms were scattered backwards, why did Rutherford condude that the atom was mostly empty space?