HW#11: pg. 97 Rev 4 – 6; CST 4 – 6
Rev 4 – 6
4. Why are gamma rays generally harmful to life-forms, but radio waves are generally harmless?
5. In the particle description of light, what is color?
6. What is an atom? In what ways does the Bohr model of atomic structure differ from the modern view?
CST 4 – 6
4. Compared with a star having many blue absorption lines, a star with many red and blue absorption lines must be (a) cooler; (b) of different composition; (c) moving away from the observer; (d) moving away from the other star.
5. An atom that has been ionized (a) has equal number of protons and electrons; (b) has more protons than electrons; (c) is radioactive; (d) is electrically neutral.
6. In Figure 4.10 ("Atomic Excitation"), compared with an electron transition from the first excited state to the ground state, a transition from the third excited state to the second excited state emits a photon of (a) greater energy; (b) lower energy; (c) identical energy.