A photon has a frequency 4873935 Hz. Calculate its energy in Joules. Answer in Scientific Notation. Round your answer to 2 significant figures.
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- What is critical temperature Tc ? Do all materials have a critical temperature? Explain why or why not.Gamma rays (?-rays) are high-energy photons. In a certain nuclear reaction, a ?-ray of energy 0.836 MeV (million electronvolts) is produced. Compute the frequency of such a photon. How do I enter 2.02*10^20 in the answer window?(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically involve integrating or extending the concepts presented thus far.) . A mixture of hydrogen and neon is heated until it is luminous. Describe what is seen when this light passes through a prism and is projected onto a screen.
- Integrated ConceptsWhat is the wavelength of a 50-GeV electron, which is produced at SLAC? This provides an idea of the limit to the detail it can probe.What is positron emission tomography (PET) and how it works?1. Wien’s Law states that the peak wavelength of photons emitted by an object is inversely proportional to the object’s absolute temperature. For a 4,000 K body, the peak photon wavelength is 1000 nm. What is the peak wavelength of photons emitted by an object with a surface temperature of 212 F? 2. An object with a temperature of 5,000 K emits an electromagnetic (EM) flux of 50 nanowatts. Apply the blackbody radiation law to calculate approximate EM flux emitted by this body if its temperature is changed to 18,000 F.
- Suppose an unknown element has an absorption spectrum with lines corresponding to 2.5, 4.7, and 5.1 eV aboveits ground state and an ionization energy of 11.5 eV. Drawan energy level diagram for this element. (b) If a 5.1-eVphoton is absorbed by an atom of this substance, in whichstate was the atom before absorbing the photon? What willbe the energies of the photons that can subsequently beemitted by this atom?identify the knowns, unknown(s), appropriate formula(s) then computation 1. a). The wavelength of maximum solar emission is observed to be approximately 0.475μm. What is the surface temperature of the sun (assumed as blackbody)? (b) The temperature of the human body when having a high fever is 40 deg C. The intensity of radiation emitted by the human body is maximum at what wavelength? (c) The Cosmic Microwave Background radiation (CMB) fills the universe. If temperature of the space is 2.7 K, then CMB attains intensity maxima at what wavelength?How much total kinetic energy will an electron–positronpair have if produced by a 3.64-MeV photon?
- What is the maximum wavelength shift Δλ = Blank 1. Calculate the answer by read surrounding text. fm for a Compton collision between a photon that travels at a speed of 254214189.33m/s and a free proton with mass 1.69E-27kg? [NOTE: Units of wavelength shift must be femtometer (fm). Enter only a numerical answer in two decimals on a space provided.]To get an idea of how empty deep spam is on the average, perform the following calculations: (a) Find the volume our Sun would occupy if it had an average density equal to the critical density of thought necessary to halt the expansion of the universe. (b) Find the radius of a sphere of this volume in light years. (c) What would this radius be if the density were that of luminous matter, which is approximately 5% that of the critical density? (d) Compare the radius found in part (c) with me 4-ly average separation of stars in the aims of the Milky Way.