Answer to Question 1
Answer: Ultraviolet light (UV) is in the range of frequencies that resonate with atoms and molecules in the glass. At resonance, the amplitudes of vibration are very large and atoms and molecules hold onto UV energy for millions of vibrations, during which time the energy is passed to neighboring atoms by many collisions. The transmitted energy takes the form of thermal energy instead of light. So although glass is transparent to visible light, it isn't to UV.
Answer to Question 2
Answer: According to the model of light presented in the text, when a photon is incident on a glass surface it is absorbed by a glass molecule or atom and forced into vibration. This vibration results in the emission of an indistinguishable photon, which travels to the next atom or molecule to repeat the process. A cascading process of absorption and reemission occurs until the glass molecule at the far surface absorbs and reemits an identical photon.
An overview of photosynthesis: cooperation of the light reactions and the Calvin cycle.
How noncyclic electron flow during the light reactions generates ATP and NADPH.
Glass Frog
Frederic Edwin Church conveyed the romantic sensibility in Twilight in the Wilderness (1860). The cl
How wide must a narrow slit be if the first diffraction minimum occurs at 12 with laser light ...
A small 355-g box hangs from one end of a thin light string that goes over a frictionless ...