fundamentos de física moderna, semestre

Dear classmates... solve the following exercises and send them at 20:00 h., to the following email address

jose.gogu@outlook.com

1. A microwave oven emits 700 W of radiation at a frequency of 2.45 GHz. How many photons does it generate per second?
2. The filament of a 60 W incandescent light bulb has a temperature of 3300 K.

               a.  Assume the filament is an ideal blackbody and determine the peak wavelength of its spectrum.

               b.  Assume the peak wavelength is equal to the mean wavelength of the visible photons emitted and determine the number of photons emitted per second.

3. The world's most powerful laser is the Petawatt at Lawrence Livermore National Laboratory in California. At full energy of about 680 joules, the shots delivered by the Petawatt last a mere 440 femtoseconds. The resulting rapid dump of energy when applied to a small space is sufficient to knock neutrons loose from medium sized nuclei like gold or to split heavier nuclei like uranium in two. When applied to light nuclei like hydrogen, the power of the Petawatt could be used to initiate nuclear fusion (the process that powers the sun) in reactors on earth.

             What is the power of the Petawatt beam?

              What is the energy per photon assuming a wavelength of 1057 nm?

              How many photons are delivered per shot?

Have a nice afternoon