Radiation.

Slides:



Advertisements
Similar presentations
The Electromagnetic Spectrum
Advertisements

By Meghan Burton Period 3 June 12, 2006
Chapter 16: Weather Factors
ENERGY FROM THE SUN.
Light and Atoms Chapter 3.
Chapter 22 Heat Transfer.
Thermal radiation Any object that is hot gives off light known as Thermal Radiation.  The hotter an object is, the more light it emits.  As the temperature.
Light. Photons The photon is the gauge boson of the electromagnetic force. –Massless –Stable –Interacts with charged particles. Photon velocity depends.
Lesson Essential Question: How does the sun’s energy affect Earth and the atmosphere? 1.Where do you think the Earth gets most of its energy from?
Chapter 16. Weather Factors SECTION 1. ENERGY IN EARTH´S ATMOSPHERE PG. 542.
Heat Transfer  How is heat transferred from one place to another?  What is moving?  In mechanics energy can be transferred through a particle (e.g.
4 Light and Temperature Astronomy: The Science of Seeing.
Radiation Heat Transfer. The third method of heat transfer How does heat energy get from the Sun to the Earth? There are no particles between the Sun.
Handout (yellow) Solar Energy and the Atmosphere Standard 3 Objective 1 Indicators a, b, and c Standard 3 Objectives 1, 2, and 3 Workbook Pages 3,
CPO Science Foundations of Physics
7.3 Clothing, Insulation and Climate New ideas for today: Thermal radiation Emissivity Insulation and Climate.
L 18 Thermodynamics [3] Heat transfer processes –convection –conduction –radiation  Physics of the atmosphere –Greenhouse effect –climate change –the.
Copyright © 2010 Pearson Education, Inc. Lecture Outline Chapter 16 Physics, 4 th Edition James S. Walker.
Blackbody Radiation & Atomic Spectra. “Light” – From gamma-rays to radio waves The vast majority of information we have about astronomical objects comes.
Electromagnetic Radiation. Is light a wave or a particle? Yes It’s both, and neither At atomic scales, we have no exact analogs for phenomena For some.
Our Universe.
Chapter 2 – Solar Radiation and the Seasons
Energy in the Atmosphere
Transmission of Heat. Conduction n Heat transfer due to direct contact n Either between different materials in thermal contact or different parts of the.
GCSE Science A Physics 1 Waves Learning Outcomes Identify thermal radiation with electromagnetic radiation. Describe the greenhouse effect in terms visible.
Spectra What determines the “color” of a beam of light? The answer is its frequency, or equivalently, its wavelength. We see different colors because.
Radiation Fundamental Concepts EGR 4345 Heat Transfer.
Key Idea #14 There is a relationship between the warming of the Earth’s atmosphere by the sun and convection within the atmosphere and oceans.
Chapter 3 Solar and Terrestrial Radiation. Driving Question How does energy flow into and out of the Earth-Atmosphere system? Law of Energy Conservation.
Topic 6. Without energy from the sun, conditions on Earth would be different. What is the energy that is radiated from the Sun? The energy that is radiated.
Chapter 2: Warming the earth and the atmosphere
Spectra. White Light Light from many colors mixes to form white light. Different colors have different wavelengths. Shorter wavelengths bend more through.
Electomagnetic spectrum Visible light DopplerWavesLaws Misc $ 200 $ 200$200 $ 200 $ 200 $400 $ 400$400 $ 400$400 $600 $ 600$600 $ 600 $ 600 $ 600.
L 18 Thermodynamics [3] Heat transfer Heat Capacity convection
Chapter 22 Section 2 Handout
EARTH’S ENERGY. Energy from the Sun Nearly all of Earth’s atmosphere energy comes from the sun as electromagnetic waves. Most of the energy comes from.
Heat in the Atmosphere The sun’s energy is transferred to earth and the atmosphere three ways Radiation, Convection and Conduction.
Weather and Climate Unit Investigative Science. * All materials are made of particles (atoms and molecules), which are constantly moving in random directions.
The Cycling of Energy Chapter 3-3 Study Guide. What is heat flow?  The transfer of energy from a warmer object to a cooler object.
Chapter 16 : Weather Factors Section1 : Energy in the Atmosphere By : Katelyn Angers.
Journal #22 What is the purpose of a barometer? What is the most commonly used barometer?
Effects of Electromagnetic Waves Light: Temperature, Scattering & Absorption.
INSOLATION Incoming Solar Radiation Portion of sun’s output of electromagnetic radiation that is received by earth.
4 Light and Temperature Why Infrared Cameras Work.
Blackbody. Kirchhoff’s Radiation  Radiated electromagnetic energy is the source of radiated thermal energy. Depends on wavelengthDepends on wavelength.
Cool, invisible galactic gas (60 K, f peak in low radio frequencies) Dim, young star (600K, f peak in infrared) The Sun’s surface (6000K, f peak in visible)
WEATHER AND CLIMATE Chapter 1 THE ATMOSPHERE. Section 2 Heating of the Atmosphere.
Physical Principles of Remote Sensing: Electromagnetic Radiation
Explain where heat is “coming from” and “going to” in this picture.
Chapter 13 The Transfer of Heat.
Blackbody Radiation/ Planetary Energy Balance
Heat Transfer Convection is the transfer of heat by the bulk movement of a fluid. Convection can be natural or forced.
Foundations of Physics
Transfer of Energy.
8.3 Earth’s Climate System
Blackbody Radiation/ Planetary Energy Balance
L 18 Thermodynamics [3] Heat transfer Convection conduction radiation
Solar Energy and the Atmosphere
Blackbody Radiation.
L 18 Thermodynamics [3] Heat transfer Heat Capacity convection
Chapter 13 The Transfer of Heat.
Chapter 13 The Transfer of Heat.
5.4 Thermal Radiation 5.5 The Doppler Effect
Thermodynamics Atmosphere
Electromagnetic Radiation
Energy in the Atmosphere
Electromagnetic Radiation
Heat in the Atmosphere.
ELECTROMAGNETIC RADIATION
Energy in the Earth’s Atmosphere
Presentation transcript:

Radiation

Hot Metal When metal is heated enough it glows. The color changes with temperature. Red – orange – yellow – white Light can cross a vacuum. Carries energy with it.

Radiation from Heat Heated objects give off electromagnetic waves. Higher temperature has more radiation A hot object gives off a spectrum of frequencies. Shifts based on temperature low energy high energy frequency intensity

Stefan-Boltzmann Law Radiation increases with temperature. Energy rate increases as 4th power of temperature Stefan-Boltzmann Law. P = power (W) A = surface area (m2) T = temperature (K) e = emissivity (0 to 1) s = constant (5.67 x 10-8 W/m2K4)

Blackbody Emissivity measures the ability of an object to radiate heat. It is the same to absorb heat. A perfect emissivity of 1 is a blackbody. Low e near 0 High e near 1

Surface Temperature Assume the sun is a blackbody radiating 3.9 x 1026 W, and its radius is 7.0 x 108 m. What is the surface temperature? First find the surface area. A = 4pr2 Now apply the Stefan-Boltzmann Law T = 5.8 x 103 K

Absorbing Heat Objects that radiate also absorb. Absorption coefficients for different materials The radiation heat can be converted into thermal energy. Angle of radiation reduces energy

Seasons Earth absorbs radiation from the Sun. The tilt of Earth’s axis changes the radiation absorbed. Summer vs winter

Greenhouse Effect The atmosphere only permits visible light and radio waves. Visible light warms the surface. The surface absorbs visible light and radiates infrared. The infrared is trapped and warms the air. atmosphere visible light infrared light earth

Feedback: Privacy Policy Feedback
Do Not Sell My Personal Information
About project: SlidePlayer Terms of Service

© 2024 SlidePlayer.com Inc. All rights reserved.