Lab: Blackbody Radiation and Greenhouse Effect Much of the light we see comes from atoms and molecules, which are so hot they direction it is moving, the acceleration of electrons at the exterior of the atom causes light to be emitted. Objects at temperatures like the surface of the sun emit light in the visible part of the spectrum. for a better understanding of what blackbody radiation is, read section 8.6 that is given the maximum power (p. 31 1) and example 8.4 which uses it To see the relationship between temperature and frequency of sunlight and light emitted by the earth itself, open the simulation Blackbody Spectrum; https://phet.colorado.edu/sims/html/blackbody-spectrum/latest/blackbody. The graph shows the distribution of light in terms of wavelength. In this chart, the intensity of light. (See Figure 8.38 on p. 312.) the boxes labeled "Graph Values" and "Labels" to see the specific spectrum the wavelength fansity and in what part of the electromagnetic Set the temperature slider so the temperature is 5800 K, about the temperature of opens. If you've set the -Graph Values" check box, the simulation should identify the wavelength of the peak intensity. But we can also calculate this temperature ( see Record the value here: Sun: ) - nvert this to m. (Use scientific notation). Use this to calculate the frequency of the light: f = = ; If wavelength is in example of how to do th come out in Hertz (Hz). See Example 8.2 on p. 303 for an Adjust the temperature to 300 K, ground temperature on a warm day. At first glance, it appears nothing is graphed for this low temperature. But if you are two magnifying glass icons . one + and one -. Click on the " minus magnifier" Lab: Blackbody Radiation and Greenhouse Effect andif you can then click on upper left of the graph Record the wavelength and calculate the frequency as before. Earth: * = Earth: - Record the results into the following table. Temperature (K Wavelength (m) Frequency Hz 300 Review the infographic below. The entire spectrum is depicted, illustrations as well, indicating their wavelengths when compared to physical the atmosphere is mostis transparent but also to spectrum to which bottom). [See next page.] 10 pm tam "avelength, low-frequency radio waves to short-wavelength, high-frequency gamma rays. (Chaisson, 20130909, p. 66) ord 20 10 hits : 1 micron - 1 micrometer - 1 jim - 1 millionth of a meter - 150 Microns - Average Human Har - Lint, Particles Visible to the Naked Eye Heavy Dust, List, Fertilizer, Pollen Average Dust, Planet Spores Mold Bacteria, Light Dust Animal Dender Bacteria, Tobacco and Cooking Smoke, 001 0 01 Morons Graphic copyright @ 2019 Pickcomfort.com All Rights Reserved. Visible light wavelengths are usually represented in nanometers, which are 1 am - 1 x 109 m . 1 jim - 1000 nm and so 0.5 um - 500 nm . Visible light ranges from 400 nm (violet) to 700 nm (red). Opacity is the opposite of transparency. The effect of atmospheric opacity is Earth's atmosphere is transparent. Component gases that make up parts of Water vapor (H20) and carbon dioxide (com) are strong aformer deaths. radiation. (Chaisson, 20130909, P. 68) For a simulation of the interaction of different kinds of light and important atmospheric gases, see this link: https:/ghet.colorado. Lab: Blackbody Radiation and Greenhouse Effect Questions: In what spectral region does the major wavelength emitted from the Sun gamma ray. appears Spectral region does the major wavelength emitted from the earth radiation to peggy able that the earth's atmosphere will allow the solar radiation due earth's temperature to pass ? called " Greenhouse case will absorb infrared light? (These are sometimes Sunlight carries energy which sets absorbed by the earth. Infrared light also absorb more infrared light before the light can leave the atmosphere, what does conservation of energy say should change about the gases that absorb the energy? Reference: Chaisson, E., McMillan, S. (20130909). Astro omy Today, 8th