E.M. INTERACTION WITH MATTER 1 SCATTERING of E.M. RADIATION Type of scattering depends on the e.m. energy‚ ~! wrt the electron energy: Ionization energy EI Rest-mass energy me c2 2 CLASSICAL MODEL E.M. wave interacting with an oscillating electron Frequency of oscillation is given by Coulomb energy: !02 = kC /me e.m. field adds a driving force at e.m. frequency !‚ F = Radiated power is related to the electron acceleration‚ a 2 ✓ ◆2 !4 2 cE (!02 ! 2 )2 0 cE02 = P/I0 ‚ I0 = The cross-section
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Have you ever seen how beautiful a lava lamp can be with all of the different colors it can have? I’ve always wondered what kind of material a lava lamp contains inside to get its color and what those floating blobs is made out of! Since I was a young kid‚ I’ve always had a lava lamp in my room just because it is amazing to look at. In this journal‚ I will explore exactly what is inside of a lava lamp that makes people like me attracted to it. Did you know the real name of the lava lamp is called
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All three of these sources have a lot of interesting facts‚ experiments‚ and tips about energy and how to save it. In the Energy Story‚ the author talks about how we use energy and how many things require energy and use a lot of it.They also talk about where it was first discovered‚ where it comes from‚ and how it works. The next story Short Circuit tells us how to do an experiment and explains what causes it and what is happening. The final story Conducting Solutions talks to us about ions and and
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The Nominee In this assignment‚ I am tasked with nominating a 20th-century figure whose work or artistic contributions can be classified in both the Age of Modernism and the Age of Pluralism for the 20th Century Genius Award. My nominated figure stands out in my mind as a genius of Western culture in many ways. I have nominated the one and only Albert Einstein. This nomination may seem cliché to some‚ but no one can deny the fact that his work in the world of science and theory is still very much
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Unit-1 Wave mechanics |Q.1 |Show that the phase velocity of de-Broglie wave is greater than the velocity of light. | |Q.2 |State and explain Heisenberg uncertainty principle. Using this principle show that the electron cannot reside in the nucleus of an atom. | |Q.3 |Prove that group velocity is equal to the velocity of the particle with which the waves are associated. | |Q.4 |Distinguish
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Of course‚ we live in an imperfect world and not all surfaces are smooth. When light strikes a rough surface‚ incoming light rays reflect at all sorts of angles because the surface is uneven. This scattering occurs in many of the objects we encounter every day. The surface of paper is a good example. You can see just how rough it is if you peer at it under a microscope. When light hits paper‚ the waves are reflected in all directions. This is what makes paper so incredibly useful -- you can read
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ACCESS TO LIFE SCIENCES UNIT 2: ENERGY and WAVES (Level 3) written assignment This written assignment covers assessment criteria 5 and 6 The Photoelectric effect‚ and the Production of Light In 1887 Hertz discovered the photoelectric effect‚ where electrons were emitted from a zinc surface when illuminated with ultra-violet light. These electrons (called ‘photoelectrons’) were only emitted when the frequency of the ultra-violet light was above a certain value (called the ‘threshold frequency’)
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REPORT SHEET Date | 2.26.2013 | | Name | Tina Mwale | Flame Tests | | | Include the data sheet with this report sheet. 1. An AM radio station broadcasts at a wavelength of 0.500 kilometers. Microwaves can have a wavelength of 12 cm. A fire place can give off photons with a wavelength of 1.5 x 10-3 millimeters and the X-rays used in a dentist’s office have a wavelength of 2.1 x 10-11 meters. Ultraviolet rays‚ the ones that give you sunburn or fade the colors of clothes have
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School of Physics Faculty of Science Moodle Home Announcements User Guides i PHYS1160-Introduction to Astronomy T1 2014 You are logged in as Henry Cai (Logout) My courses UNSWA - University of New South Wales SCI - Faculty of Science PHYS - School of Physics Module 3 (Weeks 5-6) — Life on Earth and in the Solar System PHYS1160-5144_01311 Module 3 Quiz Quiz navigation 1 2 3 4 5 6 7 8 9 10 11 Started on State Completed
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The Iodination of Salicylamide Questions: 1. a) The possible sites of iodination of the salicylamide ring is on the ortho/para position to the -OH group. b) The most likely site of iodination is the para position. This spot has the least steric hindrance and is favorable due to the directing effects of the -OH and the withdrawing effects from the carbonyl. 2. The homo surface shows that salicylamide has large electron density at the para and ortho positions. These sites are more likely
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