Documents about Incandescent Light

  • 4 Pages


    Allegheny, ECON 290

    Excerpt: ... Entrepreneurship I Quiz Notes 10/29/08 Parts of Unions plan Boost sales Switches to commission based approach Replaces 11 people Corrugation is too narrow Quality is bad She does hands-on original research Poor quality of paints Outsourcing Long lag time between resupply times She keeps after Lowes by getting the business She goes store by store to build the business back up Animal containment facilities (barns) She moves on up to roofing (where margins are higher) How does she manage her empire How she manages the weekly reports She checks in with managers once a week in person Very successful Growth focused Opportunity focused Edison one of the most famous inventors Phonograph Incandescent light bulb Improved on telegraph Improved on telephone Who was on his team Most significant thing his research lab What about his team/? He is brilliant in chemistry, physics, mechanics, etc. One thing he got messed up on: Math ...

  • 1 Pages


    Doane, LO 1

    Excerpt: ... File LO1Lec2 Lecture Content and Activity Notes: Start with classical E&M field and showed the total E&M spectrum and the very small region of visible light in the whole thing. Using f = c relationship showed that E=hc/ . Do the calculation for 550 nm light, which is the peak sensitivity for a typical human being. The answer of about two electron volts is then discussed as the order of magnitude for optical processes. Compare this to thermal processes (room temperature is only about 0.02 eV) and chemical processes which are typically tenths of an eV. Show a dim incandescent light bulb and turned it up bright to show that even as a bright light it would not discharge a charged electrometer. Showed Planck's law fit to the data. Do the Photoelectric demo again and show the influence of glass on the UV light source. light as photons. Show three gas tube light sources and distribute good diffraction gratings for the students to use to look at the spectra. Show the Balmer series and discuss th ...

  • 5 Pages

    Exam 2 quiz problems

    Penn State, EGEE 102

    Excerpt: ... tor operates for 15 hours every day, what is the annual operating cost of the refrigerator, if the cost of electricity is $0.11 per kWh? Annual operating cost = 198 / 1000 * 15 * 0.11 * 365 = $119.2455. Highly energy efficient appliances have an Energy Star label. Calculate the amount of heat energy required to heat 126 lbs of water from 62oF to 121oF. Amount of heat energy required = 126 * (121 - 62) = 7434 BTUs. Calculate the amount of heat energy required to heat 185 lbs of water from 61oF to 134oF. Amount of heat energy required = 185 * (134 - 61) = 13505 BTUs. For most efficient operation, keep the freezer filled to capacity. Chapter 6 (10) A 120 watt incandescent light bulb is operated for 6 hours, and a 15 watt fluorescent light bulb is operated for the same period of time. At 8 cents per kWh, what is the cost savings of the fluorescent bulb? Energy consumed by Incandescent light bulb = 120 / 1000 * 6 = 0.72 kWh Energy cost for Incandescent light bulb = 0.72 * 8 / 100 = $ 0.0576 (round up to $0.06) Ene ...

  • 4 Pages


    George Mason, PHYS 103

    Excerpt: ... t in a typical bulb is 0.5 m of 25 micron coiled up into a length of 2 cm Filament lifetime tungsten atoms sublime filament gets thinner with time inert gas added to prolong life but gas adds to convective heat loss (total efficiency is 10%) dark spot at top of bulb is actual tungsten atoms 3-way Bulb Larger filament has greater surface area so it radiates more power 3 Test your understanding If you remove the gas in an incandescent light bulb, will it become more efficient, less efficient, or stay the same When you operate a 50-100-150 W bulb at its lowest setting, it emits yellow-white light. If you use a dimmer switch to operate a regular 150 W bulb on only 50 W electrical power, it emits orangeish light. Why? Main Points from Today's Lecture Thermal Radiation You should understand that all things radiate electromagnetic waves (or light). Light comes in different "colors" (wavelengths). The hotter the object, the greater the power of radiation emitted and the shorter the wavelength at ...

  • 2 Pages

    X-Ray Diffraction

    Wisconsin, ME 240

    Excerpt: ... are generated g. Heavy elements are more efficient producers of x-rays than light elements F. Other notes from Part 2 a. General Wavelength of x-rays: 10^-6 to 10^-10 cm b. Time-line of X-rays Part 3: The Generation of X-Rays and X-Ray Spectra A. Generation of X-Rays a. Electrons are boiled off a heated tungsten filament (similar to the operation of an ordinary incandescent light bulb) b. The large voltage placed between the metal focusing cup and the tungsten filament quickly accelerates electrons towards the focusing cup c. Some of the electrons pass through he hole in the focusing cup where they then travel a short distance to the target d. Along with a great deal of hear, x-rays are generated when the accelerated electrons strike the metal target e. X-rays then pass out of the x-ray tube through beryllium windows, that are transparent to x-rays, to be used in diffraction studies B. The Two Methods of Generating X-rays a. Involves collisions between accelerated electrons and the nuclei of the atoms of ...

  • 22 Pages


    Arizona, CHEM 151

    Excerpt: ... GenChem Week 5 Today's Agenda: Review understanding of light. Develop the day's problem. Perform the first challenge: measure the light emitted by an incandescent light bulb. Analyze results: determine the amount of light generated at different wavelengths. Determine the amount of energy generated at different wavelengths. Perform the final challenge: measure the light emitted by other light sources. Analyze results: determine the amount of light and energy generated at different wavelengths. Secondary analysis: compare light generated to power required. Final analysis: draw conclusions. Making Light Efficiently GenChem The chemistry of green Why would someone say that the 21st century must be the "Green Century"? GenChem Global Warming Why the concern? GenChem Greenhouse Gases What are they? Where do they come from? What's the connection to global warming? Gases that absorb energy (trap heat). Burning of fossil fuels, among other things. Increased amounts of greenhouse gases in ...

  • 20 Pages


    Georgia Tech, ECE 4007

    Excerpt: ... Wireless Power Transfer by Inductively Coupled Coils Georgia Institute of Technology Electrical & Computer Engineering Curtis Jordan, Daniel Deller, Ray Lecture, Deller, Malik Little, Justin Freeman, Skip Dew Whit Smith Wednesday, December 1, 2008 Project Overview Transmit power wirelessly by resonant inductive coupling Charge a battery wirelessly Provide freedom of movement in electronic devices Target Market General electronics consumers Industrial and commercial electronics suppliers Cost Price per unit will be $250 Industrial cost varies with size of application Design Objectives Replicate MIT's demonstration Transmit power over 2 meter distance Illuminate an incandescent light bulb to verify system operation Improve system efficiency Improve the design of coils to increase dipole strength Add a reflector plate behind transmitting coil Charge a AA battery Design high frequency rectifying circuit Eliminate harmonics to maintain resonant frequency Coil Evolution Power Amp Previous power ...

  • 16 Pages


    Idaho, ENVS 101

    Excerpt: ... rmal and biomass energy. 5. Rank renewable energy sources from greatest to least potential looking 50 years into the future. Justify your ranking. Reading Assignment: Brennan and Withgott: Chapter 20; pages 588601. Chapter 21; pages 602628. 2 UNIT 5: ENERGY 5. RENEWABLE ENERGY RESOURCES MODULE 5.1 Improving Energy Efficiency A. IMPROVING ENERGY EFFICIENCY 1. Doing More with Less 84% of all commercial energy used in the USA is wasted Energyefficiency ENERGY EFFICIENCY - the percentage of total energy input that does useful work Increasingenergyefficiency-cars cars - 1975 - 1988 - 1992 - 1994 - 1997 - 2001 - MPG 1 mpg on US cars = 3 2. CASE STUDY 1 Compactfluorescents(CFLs)vsIncandescentLight Bulbs Efficiency: incandescent light ing fluorescentlighting CFL Sales: 1988 1992 1996 2000(est) CFLs last 10X as long as incandescents In 1999 incandescents out sold CFLs by 25:1 CFLtechnologycontinuestoimprove 4 3. CASE STUDY 2 THE CAR OPTIONS: InternalCombust ...

  • 7 Pages

    Review Sheet for Final Exam E8 (2)

    UC Irvine, ENVIRON E8

    Excerpt: ... leading to environmental collapse: 1. Environmental Damage 2. Climate changes 3. Hostile neighbors 4. Friendly trade partners 5. Society's response to environmental problems Four explanations why societies make disastrous decisions: 1. Failure to anticipate problems 2. Failure to perceive problems when it arrives 3. Failure to try and solve the problems 4. Unsuccessful solutions *Twelve environmental problems AND how they are linked Two primary environmental problems: 1. Deforestation 2. Soil Problems *Two crucial behavioral choices Tragedy of the Commons: The depletion of a shared resource. The problem is that the people's actions will not make a difference in the gathering of resources which causes a extreme tragedy. Brown Restoring Earth chapters Ways to restore earth Ways to offset increase in energy use (using incandescent light bulbs, hybrid vehicles) Examples of renewable energy (wind, geothermal, hydro, solar, wave) Questions to think about: Identify the environmental problem you feel is the most i ...

  • 11 Pages


    Arizona, AS 102

    Excerpt: ... d on the back of the spectroscope. Along with the spectrum is a wavelength scale. If your eyes don't focus well on close up objects, you may have to hold the spectroscope out a little distance to see it clearly. Taking Spectra with your Spectroscope NOTE: Any portion of the activity may be done in any order. That is, you may start with any of the 4 sections: either the "Fluorescent Light Bulb", or the "Discharge Tubes", or the " Incandescent Light Bulb". All of the sketches of spectra should be recorded on the template page at the end of the handout using colored pencils if possible (available at the lab but please bring your own if you have some). If you don't have colored pencils, be careful to label the ends of the drawing "red" and "blue" to match the colors you see. 1. Incandescent Light Bulb a. Looking through your spectroscope, examine the spectrum of an incandescent light bulb. You should see a continuous spectrum. On the left and right sides of the spectrum, the colors appear to fade to black. An inc ...

  • 3 Pages

    Experiment5 copy

    Cornell, CHEM 2070

    Excerpt: ... Experiment #5: Optical Spectrometry Purpose: The purpose of this experiment was to observe the emission spectra of various compounds by methods of spectrometry including the use of a spectrometer and a computer, to conceive and perform a procedure to identify the composition of a solution containing multiple ionic salts, and to construct an energy-level diagram for hydrogen. Results and Discussion: First, the spectra of a fluorescent light, an incandescent light , and helium were observed through a spectrometer. The wavelength, resulting color, and intensity were recorded for each emission and line of the spectra. Color, above each spectrum, wavelength, marked on each spectrum, and intensity, indicated below each spectrum, are all shown in the attached appendix, Experiment 5: Optical Spectrometry. See this appendix for results tabulated. Intensity was estimated on a scale of 0-10 for readings recorded through the spectrometer, and recorded out of a scale of 4000 for the readings measured by the computer. W ...