What is light bulb? ▶ light bulb is a device that emits light through current. It is made of glass balls containing vacuum or inert gas. ▶ It uses electricity.

Slides:

Advertisements

Similar presentations

What is Light?.

Advertisements

Incandescent Lightbulbs. Introductory Question  An incandescent lightbulb contains some gas with the filament. How would removing the gas affect the.

Types of Light Bulbs and Their Uses

Contact Points and Light Bulbs

Project Prepared by Sukanti Majhi class-viii Manaswini Padhi class-viii Govt. Girls High School Koraput.

PHYSICS 103: Lecture 20 Blackbody Radiation Light Bulbs Agenda for Today:

What Affects the Flow of Electricity? Some materials are good conductors. Electricity flows best through conductors. The base and the wires of a light.

Producing Visible Light EQ: How is visible light produced?

Team 10 Device Comparison: Incandescent vs. Fluorescent Light.

IP Introduction © Oxford University Press 2011 Introduction.

Inside an Incandescent Light Bulb. You are will be using an incandescent light bulb to build circuits in class.

Mr. Fleming.  D. 5 Explain how electricity is used to produce heat and light in incandescent bulbs and heating elements.

WHAT IS LIGHT? The Zebrafish are emitting light when exposed to ultraviolet light. Salton Sea in California has algae that emit light giving it this glow.

Types of Light Emissions

Electrical Resistance Gr 9 Science. 4 Electrical resistance = the property of a substance that hinders electric current and converts electrical energy.

Sources of Light 1.Sun -the most abundant natural source of light on Earth -produced through nuclear fusion where hydrogen (H) combines to form helium.

UNIT 1: ELECTRICITY AND ELECTRONICS (PART 3) TECHNOLOGIES ESO 3.

Wasted energy Not all energy is changed into the type we want.

Chemistry Ms. Pollock Atoms and Electromagnetic Spectra.

Electrical Potential (Voltage) Answers (Page 303)

Energy Transfer Diagrams Starter Activity (back of jotters): 1)What are the 10 types of energy? 2)Draw an energy flow diagram for an ipod.

Incandescent Light Bulb 22 Inventors of incandescent light bulbs before Edison Heated metal filament glows when heated and is protected from air by glass.

Incandescent Light Bulbs 1 Incandescent Light Bulbs.

Active Devices Vacuum tubes. Thomas Edison’s light bulb – Glass envelope – Vacuum – Filament.

My Pals are Here! Science © 2008 Marshall Cavendish (Singapore) Private Limited © 2009 Marshall Cavendish International (Singapore) Private Limited.

Active Devices Vacuum tubes. Thomas Edison’s light bulb – Glass envelope – Vacuum – Filament.

Emissivity VS. Wavelength 36. R&D/Process Control Infrared Image: Steel Slab Infrared Image: Steel Slab 37.

Production of Light.

Friday 2/24/12 Wrapping Up Batteries, Circuits and Bulbs.

Magnetism & Electromagnetism

Guiding Questions for Objective 2: How are all light bulbs, (incandescent, fluorescent, halogen, and LED’s), alike in producing light? How are all of these.

Housing Decisions Functions of lighting – p Natural light Artificial light – p –Incandescent –Fluorescent –Compact fluorescent –Fiber.

What Is Light? Optics is the study of light Light Is a form of energy Travels in straight lines Is transferred by radiation Is an electromagnetic wave.

Properties of Resistors Current of Electricity (Part 2)

Circuit Electricity May 30, 2012 Chapter 22. Terms  Current: Flow of charge  Symbolized by “ I ”  Units = Coulombs/second = Amperes (A)  Circuit:

Refractory Alloys Refractory metals include tungsten (W), molybdenum (Mo), tantalum (Ta) and niobium (Nb). They have a BCC structure so they display a.

 Anything that gives off light.  Sun  Stars  Fire  Candle  Electric Light Bulb.

Carbon-Carbon Compoistes What are carbon-carbon composites? Carbon - Carbon composites have carbon fibers in carbon matrix.

Efficiency Ashfield Direct Learning Verity Payne Ks4 Energy.

18.3 Resistance and Ohm’s law Resistance of a tungsten filamentExample 5 A student carried out an experiment to find the resistance of the tungsten filament.

Section 3 Section 3 Producing Light Incandescent Lights Most of the lightbulbs in your house probably produce incandescent light, which is generated by.

Resistance. What is resistance? Resistance is the amount that a material holds back the flow of electrons Atomic nuclei (plural of nucleus) get in the.

Light Sources. Luminescent materials Luminescent materials ~materials that glow when they get excited. ex. most metals, certain gases (neon) Artificial.

Conductors & Resistors

Magnets Conductor or Insulator Circuits Electrical.

Measuring Electricity. Electric Potential – the electrical energy that an electron possesses. Electric current is a measure of the rate at which the electric.

Visible Light/Optics.

Properties of Resistors

Jacob’s guide to lighting

Paths for Electric Current

By: Alejandra Gálvez Tornel

Current Electricity.

Electrical Vocabulary

Energy Transfer Diagrams

Notes 6 - Electricity.

RESISTORS A resistor is used to reduce the flow of electricity in an electric circuit. Resistorscome in fixed or variable types.

Carbon-Carbon Compoistes

LIGHT ENERGY & ITS SOURCES

Ohms Law required Practical

L 18 Thermodynamics [3] Heat transfer Heat Capacity convection

Types of Light Production

Gas law Calculations.

Topic 4: Energy and Electricity

Chapter Fundamentals of Light 16.

Properties of light, the human eye,

Chemical and Physical Changes

Producing Visible Light

Presentation transcript:

What is light bulb? ▶ light bulb is a device that emits light through current. It is made of glass balls containing vacuum or inert gas. ▶ It uses electricity to heat the filament and emits light. ▶ type: LED, Incandesent bulb

What is material of light bulb? Needs:Resistant to high temperatures,Thermal expansion Filament : It is made of tungsten. Needs:Resistant to high temperatures, transparency Bulb's surface : It is made of glass.

What is properties of light bulb? Resistant to temperaure Styrofoam wood glass fiber glass tungsten Tungsten : Electrical resistance is large. Glass : The penetrability of light is good. And the most important property is cheap.