Why do atmospheric aerosols have a cooling effect? Explain why we are fortunate that UV-C radiation is almost completely filtered out by the gases in the atmosphere. Why are water liquid and carbon dioxide gas? Explain why NO2 is more likely to exhibit resonance than CO2. Describe how...
Explain why the column of mercury first descends and then rises when a mercury-in-glass thermometer is placed in a flame. Explain why Light travels faster in vacuum than it does in a glass. What makes a hydrometer with a spherical bulb g...
The color of laser can also be different. For instance, in CO2 lasers, laser generator emits an infrared light. This laser beam is entirely visible to human eyes. 3. Directing the Laser A direction system diverts the laser beam to the focussing system. A series of mirrors can change ...