Spectral Analysis of Stars Astronomy. Energy Through Space Energy is transmitted through space as electromagnetic waves. The movement of these waves through.

Slides:



Advertisements
Similar presentations
The Electromagnetic Spectrum
Advertisements

Light and the Electromagnetic Spectrum Almost all of our information on the heavens is derived from the light we see We have returned samples from the.
Video Field Trip: Fireball
Physics and the Quantum Mechanical Model
ASTR1001 The Doppler Effect ASTR1001. Spectroscopy When the media covers astronomy, they nearly always show pretty pictures. This gives a biassed view.
Light and Atoms Chapter 3.
November 18, Electromagnetic Radiation Objectives At the end of class, you will be able to: List the forms of electromagnetic radiation Find wavelength.
Life always offers you a second chance. It’s called tomorrow.
The Electromagnetic Spectrum. Behavior of Light All light travels at the same speed 1.Behaves as a particle (photon) 2.Behaves as a wave: travels through.
Spectroscopy Study Guide
Light Solar System Astronomy Chapter 4. Light & Matter Light tells us about matter Almost all the information we receive from space is in the form of.
White Light & Electromagnetic Spectrum. What is Radiation? Energy that is transmitted from one place to another by electromagnetic waves Heat, UV rays.
Characteristics of Light
The Electromagnetic Spectrum
The Doppler Effect Solar System Day 3. Solar System Day 3- Objectives Describe how the _____________________ can be used to study the movement of objects.
Chapter 24 Studying the Sun
A photon checks into a hotel. The desk clerk asks, “Do you need help with your luggage?” The photon replies, “I don’t have any. I’m travelling light.”
Electromagnetic Spectrum. Different forms of radiation arranged in order according to their wavelength. – Travels through space at 300,000 km/s or 186,000.
Chapter 3 Astronomy TEST REVIEW. WHAT ARE ALL THE FORMS OF ENERGY THAT COME FROM THE SUN? Radio waves Microwaves Infrared Rays (Heat) Visible light Ultraviolet.
Chapter 3 Light and Matter
Waves & Particles Ch. 4 - Electrons in Atoms.
Earth Science 24.1 The Sun: Study of Light
12.6 Light and Atomic Spectra
Our Universe.
Stars and Galaxies 28.1 A Closer Look at Light Chapter 28.
Light and the Electro- magnetic Spectrum. Light and the Electromagnetic Spectrum Almost all of our information on the heavens is derived from the light.
The SUN.
5-1 How we measure the speed of light 5-2 How we know that light is an electromagnetic wave 5-3 How an object’s temperature is related to the radiation.
Evidence for the Big Bang?
Electrons and the Electromagnetic Spectrum Table Team Review — DEFINE in your own words ‘Electromagnetic radiation’. LIST three examples.
The Electro-Magnetic Spectrum. Light Properties  Have properties of waves… Crests & troughsCrests & troughs Reflect & refract (bend)Reflect & refract.
The History of the Electron When we last left the atom, this is how it looked.
Astronomy Chapter 21 page 583 Space Exploration Radiation from Space – the electromagnetic spectrum ( EM spectrum)
Brain pop.
Electromagnetic Spectrum. The Universe The Big Bang forms the universe….. The energy creates stars. Gravity pulls stars together into Galaxies. The stars.
Viewing the Universe. 8Astronomers gather information about objects throughout the universe by detecting various kinds of energy given off by these objects.
Electomagnetic spectrum Visible light DopplerWavesLaws Misc $ 200 $ 200$200 $ 200 $ 200 $400 $ 400$400 $ 400$400 $600 $ 600$600 $ 600 $ 600 $ 600.
Aim: How does light provide evidence of the universe’s composition? I. Light – a form of electromagnetic radiation. A. electromagnetic radiation – energy.
How do we really know what's out there? Space is a pretty big place and, after all, we've never been farther from earth than our moon. How do we know what.
Tools of Modern Astronomy
Copyright © 2010 Pearson Education, Inc. Lecture Outline Chapter 2 Light and Matter.
Electromagnetic Energy. Energy Energy is transmitted along waves The sun emits energy in the form of? Electromagnetic waves.
Electromagnetic Spectra. The Electromagnetic Spectrum AM radio Short wave radio Television channels FM radio Radar Microwave Radio Waves Gamma Rays X-
 Explain important properties of the electromagnetic spectrum  Describe the important characteristics of light  Discuss and calculate the speed of.
Chapter 24 Video Field Trip: Fireball Write down five facts from the video!
Models, Waves, and Light Models of the Atom Many different models: – Dalton-billiard ball model (1803) – Thompson – plum-pudding model (1897) – Rutherford.
Duluth Field Trip u Monday May 23 or Tuesday May 24 u 7:30 am – 8:30 pm u $30 for transportation u $ ?? For breakfast and dinner stops u Bring a bag lunch.
Lecture Outlines Astronomy Today 8th Edition Chaisson/McMillan © 2014 Pearson Education, Inc. Chapter 3.
Light and the EM Spectrum The terms light, radiation, and electromagnetic wave can all be used to explain the same concept Light comes in many forms and.
Life always offers you a second chance. It’s called tomorrow.
8.5CD Electromagnetic Spectrum and Light Years The student is expected to explore how different wavelengths of the electromagnetic spectrum such as light.
Starter 1.Where are most asteroids located? 2.Describe the structure of a comet. 3.Where do short period comets come from? What about long period comets?
The Study of Light. The Electromagnetic Spectrum  includes gamma rays, X-rays, ultraviolet light, visible light, infrared radiation, microwaves, and.
The Study of Light.
Unit 3.  Much of the information we get in astronomy is carried by “light”.
Light and The Electromagnetic Spectrum Why do we have to study “light”?... Because almost everything in astronomy is known because of light (or some.
AIM: How was the Universe Created? Do Now: Which planet has the shortest day? Which planet rotates on its side? Which planet has the longest rotation?
What is Electromagnetic Energy?
EMS review.
Spectral Analysis of Stars
Electromagnetic Spectrum
SCH4C UNIT 1: MATTTER AND QUALITATIIVE ANALYSIS Atomic Theory 2
How do scientists know what stars and planets are made of?
Which color of visible light has the shortest wavelength?
Electromagnetic Radiation
Energy: EM transfer I can evaluate the energy transferred by light waves based the frequency and wavelength of the light wave.
Light and The Electromagnetic Spectrum
Stars *Basic Star Information *Electromagnetic Spectrum
2.3 Light Objectives 3 and 5:b
Light and The Electromagnetic Spectrum
Presentation transcript:

Spectral Analysis of Stars Astronomy

Energy Through Space Energy is transmitted through space as electromagnetic waves. The movement of these waves through space supports the concept of the ‘Big Bang’ ~ particles are still moving as a result of a gigantic explosion from a small, concentrated area.

Electromagnetic Spectrum: The arrangement of visible light by wavelength. (ROYGBIV)

Angstrom: Very small measurement used to measure the distance between wavelengths of EM radiation. Radial Velocity: The speed of a wavelength toward or away from radar. Doppler Shift: Change in frequency toward or away from an object. [Red shift is away and blue shift is toward]

Radiation: The transfer of energy by waves. Absorption Spectrum: Spectrum of light waves as they are received. (What we see) Radiation Spectrum: Spectrum of light waves as they are transmitted. Vacuum: An area with little or no pressure (outer space). Wavelength: Distance between wave crests. Frequency: Number of cycle that pass in a specific period of time. Lambda: The frequency of a wavelength

Spectral Periodic Table

What elements are in that star? We can determine which elements are found in distant stars by using a spectroscope to observe the wavelengths of energy being transmitted from the star.

For example... Each element emits a unique wavelength of light. The colors of the spectrum from long wave to short wave are: Red, Orange, Yellow, Green, Blue, Indigo and Violet [ROYGBIV] –Long = Red –Short = Violet

Different light = Different spectrum A light bulb will emit all the colors of the spectrum, whereas gas tubes will only emit the spectra of the specific element. Elements can be identified by their unique, characteristic spectra.

As the frequency of electromagnetic waves increases, the wavelength decreases. [Inverse relationship] The width of the visible light spectrum is a very small portion of the total spectrum.

As we move across the spectrum from gamma rays (short waves) to radio (long waves), wavelength increases and frequency decreases. Therefore, infrared waves are longer than visible waves.

Balmer Absorption Lines Balmer Absorption lines are the accepted values for spectral wavelengths. We can determine the radial velocity and direction of wavelengths by comparing them to the Balmer lines.

Spectral analysis determines several star features: 1.Composition; Determined by distinguishing the elements found within the star by assessing the emitted wavelengths. 2.Radial Velocity; difference between actual and accepted (Balmer) wavelength value x speed of light divided by the accepted (Balmer) value. 3.Direction of movement; Red shift/away or blue shift/toward.