Chapter Questions
How does the frequency of the radiation emitted depend upon the temperature of the source? ____________________________________________________________________________________________________________________________
What did electromagnetic theory predict concerning the relationship between the temperature of an object and the frequency of radiation emitted? How well did the theory fit the experimental data? _________________________________________________________________________________________
Who first suggested the quantum idea that explained blackbody radiation? _______________________________________________________________________
Explain Planck’s quantum hypothesis. ____________________________________
How did Einstein expand Planck’s original quantum idea? _________________
How does quantum theory explain the observation that high-frequency light is able to cause electrons to jump free of some metals while low-frequency light cannot do so? ____________________________________________________
According to quantum theory, upon what does the brightness of light depend? ______________________________________________________________
Explain, according to Bohr’s model of the atom, how light is emitted by the atom. _________________________________________________________________
What type spectrum is produced by a heated gas? ________________________
What practical application is made of the fact that the spectrum of one element is different from the spectrum of another? _________________________
Refer to the figure of frame 12. Suppose an electron with an energy of 2.8eV strikes the orbiting electron. How much energy might this electron lose in the collision? __________________________________________________________
What is it about a fluorescent lamp that causes it to show a continuous spectrum (along with the bright line spectrum)? ______________________________
What is “black light,” and how does it make fluorescent paint glow? _______
How does phosphorescence differ from fluorescence in the manner in which the atom emits light? __________________________________________________
What causes laser light to be more intense than regular light? _____________