CC8+-+Unit+8

__**Electromagnetic Spectrum - Class Notes**__
__**1.Electromagnetic Radiation-**__ **Consists of a broad range of energetic emissions. __Electromagnetic Spectrum-__ Each type representing a particular energy range.**
 * 2. __What is a photon?__ Bundles of energy that travel as waves and move at the speed of light. These waves do not need a median or substitute to support movement.**
 * 3. __What is frequency?__ Frequency is the number of waves that pass by a given reference point per second.**
 * __4. What is wavelength?__ The distance between corresponding points of two consecutive waves; for electromagnetic radiation is the product of frequency and the wave length is equal to the speed of light. Another characteristic is the distance between the tops of the waves is called the wave length. The wave length is less energetic than its radiation**
 * 5. __What is Amplitude?__ Amplitude is the area of the wave that consists from the top to the middle.**
 * 6. __What is solar radiation?__ most of the energy emitted by the sun is spread over a large portion of the electromagnetic spectrum**
 * 7. __What is Infared radiation?__ Infared radiation causes certain bonded atoms to vibrate more energetically, which is observed as an increase in the materials temperature. Infared radiation is heat radiation. For example the infared radiation from the Sun, and can't reach Earth's surface because it is absorbed by CO2 and gaseous H2O molecules in the atmosphere.**
 * 8. __What is Visible Radiation?__ Visible radiation is visible wavelengths that we can see and detect such as the colors in the sunset and why the sky is blue.**
 * 9__.__ __What is UV radiation of the spectrum?__ UV radiation has three subcategories. UV-A radiation has the longest wavelengths, therefore giving it the lowest energy level. UV-B radiation has more energy, which can cause sunburn and too much expose is linked to skin cancer. UV-C radiation has the most energy, it is used for sterilizing materials, and kills viruses and bacteria.**
 * 10. __What is the difference between UV-A, UV-B, and UV-C?__**
 * Ultraviolet radiation contains three parts; UV-A, UV-B, and UV-C.**
 * UV-A has the lowest energy due to their long wavelengths. UV-B has more energy than UV-A, but not as much as UV-C. It is connected with skin cancer because it can cause sunburn, which can be dangerous if too much exposure occurs. UV-C is the strongest energy of ultraviolet radiation. Since it is so strong, it has the power to break covalent bonds and kill bacteria/viruses.**