Starter –Sketch in the back of your book the 3 stages of ionisation 1. Before the photon gets there 2. As it arrives 3. After it has collided Do it. As.

Slides:



Advertisements
Similar presentations
RADIO WAVES, MICROWAVES, INFRARED, VISIBLE, ULTRAVIOLET, X-RAYS, GAMMA RAYS HIGH< wavelength LOW.
Advertisements

Electromagnetic Waves
Waves and Energy Physics, Grade 8.
Quiz Electromagnetic spectrum. Using the quiz … Click through the quiz to see the questions and answers. Remember it is MUCH better to try to think of.
Science 8: Unit C: Light and Optical Systems
The Electromagnetic Spectrum. The name given to a group of energy waves that are mostly invisible and can travel through empty space Shorter waves have.
The Electromagnetic Spectrum & Electromagnetic Radiation
Essentials of Environmental Health PH 203 Dr. Khaled El-Ezaby
Physical Science 18.2 The Electromagnetic Spectrum Reading Guide
ALL ABOUT. Light is a form of energy. –Also known as electromagnetic (EM) radiation. –Carried in small packets called photons. As light wavelength increases,
Electromagnetic Waves Chapter 17 Section 1-2 Pages
Electromagnetic Waves. Electromagnetic wave is a wave that can travel through empty space or through matter and is produced by charged particles that.
Electromagnetic Waves Spectrum Foldable
Waves of the Electromagnetic Spectrum
Starter  Write down on the mini white board the types of electromagnetic wave used for communication. (Hint) Remember the types: Gate X Usually Lets In.
Electromagnetic Spectrum Identify and explain how different parts of the electromagnetic spectrum are used.
The Nature of Electromagnetic Waves. Electromagnetic Radiation  EMR requires no medium to travel- can travel thru a vacuum  Speed  300,000 kilometers.
The Electromagnetic Spectrum The electromagnetic spectrum includes a wide range of light waves, some that we can't see. Some of the non-visible types of.
The Electromagnetic Spectrum The electromagnetic spectrum includes a wide range of light waves, some that we can't see. Some of the non-visible types of.
Starter. The Electromagnetic Spectrum Learning Objectives I must be able to state that all electromagnetic waves are transverse. I should be able to.
Electromagnetic Waves
What are electromagnetic waves?
Electromagnetic Spectrum
Waves of the Electromagnetic Spectrum Magnetic Field Electric Field Producing EM waves Electric field causes magnetic field to vibrate and magnetic field.
Which day has the MOST sunlight in the United States?
Quiz quiz swap. C/W 1 st October 2011 Recap - Effects of ionising radiation Keywords: gamma rays radioactive X-rays radiographer Objectives: Must – Understand.
Visible light and the electromagnetic spectrum. we can’t see all types of light! Visible light is a very small part of a large range of radiations. It.
The Electromagnetic Spectrum (EMS). Electromagnetic Wave An electromagnetic wave is a transverse wave that carries electrical and magnetic energy. The.
Section 2 The Nature of Light Notebook # 6. 1.Visible light is composed of waves that have several different wavelengths. What happens to light that passes.
Electromagnetic and Mechanical Waves Kymberly Mayfield 11/21/11 5 TH Hour.
Look out answers to Page 21, Q. 24, 26, 28 and 30.
The Electromagnetic Spectrum 6 October Light Absorption, Reflection, and Refraction Review: Video.
24.1 The Electromagnetic Spectrum pp Mr. Richter.
C/W 2 nd November 2011 Microwaves Keywords: absorb microwave sample bias Objectives: Must – Understand the heating effects of radiation can damage cells.
Electromagnetic Spectrum yuan-sen-ting yuan-sen-ting.
Sun’s energy = __ –__ Topic: Energy from the sun.
Electromagnetic Spectrum. Different Types of Light  Light is a form of energy  It travels in waves  Also called Electromagnetic Radiation  Some Electromagnetic.
Brain pop.
Waves (2).
Section 2: Waves of the Electromagnetic Spectrum Objectives: list and compare different types of electromagnetic waves describe how the electromagnetic.
Study Hall: Sit in assigned seats, working on something quietly. Get out your new interactive notebook!
Electromagnetic Waves Have Many Uses McDougal Littel Unit D Chapter 3 Section 2 Pages If you are absent today click on the following link to read.
Electromagnetic Waves.  EM waves – waves that DO NOT need a medium to travel through, they can travel through a vacuum (empty space)  Examples of EM.
Electromagnetic Radiation
Chapter 12 Sections 1 & 2. Electric and Magnetic Fields  An electric charge is surrounded by an electric field  A moving electric charge produces a.
The Electromagnetic Spectrum. Electromagnetic Spectrum—name for the range of electromagnetic waves when placed in order of increasing frequency RADIO.
Electromagnetic Spectrum. What kind of wave is electromagnetic radiation? A sound wave is a oscillation of air. A water wave is an oscillation of the.
Waves of the Electromagnetic Spectrum
Right AWAY! Please pick up a colored piece of paper from table 4 and bring it back to your table with your lab journal. Next be sure that you have at least.
Electromagnetic Spectrum. -is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic.
Electromagnetic Spectrum
Nature of Light Waves Unit.
There is good evidence for the Big Bang from red shifted spectra and cosmic background radiation. There is uncertainty about the effect of gravity in the.
Electromagnetic spectrum. Visible light λ ≈ 700 nmλ ≈ 420 nm.
2A Electromagnetic Spectrum “What’s the Wavelength?” Foldable guided instructions 89.
Ch. 17 ELECTROMAGNETIC SPECTRUM Electromagnetic waves  Are made of changing electric and magnetic fields  EM waves DO NOT need a medium to travel 
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.
Chapter 18 Electromagnetic Spectrum & Light. Electromagnetic Waves Electromagnetic Wave: is a transverse wave consisting of changing electric and magnetic.
Waves and the Electromagnetic Spectrum Ms. Twardowski 8 Tan Dover Central Middle School.
The Electromagnetic Spectrum
© OCR 2016 Electromagnetic spectrum Lesson Element.
Electromagnetic Waves
BrainPOP Video – WAVES (4 minutes)
Electromagnetic Spectrum Project
Electromagnetic Waves
09 November 2018 (P1.5.1b) E-Mag Waves Describe uses for different parts of the E-M spectrum. (D) Calculate velocity of E-M waves. (C) Describe and evaluate.
LESSON 9 KEY CONCEPTS.
Chapter 17, Section 1 and 2: Nature of Electromagnetic Waves
Light Light is a form of energy
The E.M.S. S1 Physics Energy.
Presentation transcript:

Starter –Sketch in the back of your book the 3 stages of ionisation 1. Before the photon gets there 2. As it arrives 3. After it has collided Do it. As I could ask any of you!! (Think about the key words)

C/W 1 st November 2011 Effects of ionising radiation Keywords: gamma rays radioactive X-rays radiographer Objectives: Must – Understand the risk of using x- rays and gamma rays Should – understand the precautions you need to take with x-rays and gamma rays. Could – Understand risk, and perceived risk

Come up with the person next to you the top 5 ways you think you are most likely to die (30 seconds) Halloween lesson!

Cause of DeathLifetime Odds Heart Disease1-in-5 Cancer1-in-7 Stroke1-in-23 Accidental Injury1-in-36 Motor Vehicle Accident*1-in-100 Intentional Self-harm (suicide)1-in-121 Falling Down1-in-246 Assault by Firearm1-in-325 Fire or Smoke1-in-1,116 Natural Forces (heat, cold, storms, quakes, etc.)1-in-3,357 Electrocution*1-in-5,000 Drowning1-in-8,942 Air Travel Accident*1-in-20,000 Flood* (included also in Natural Forces above)1-in-30,000 Legal Execution1-in-58,618 Tornado* (included also in Natural Forces above)1-in-60,000 Lightning Strike (included also in Natural Forces above)1-in-83,930 Snake, Bee or other Venomous Bite or Sting*1-in-100,000 Earthquake (included also in Natural Forces above)1-in-131,890 Dog Attack1-in-147,717 Asteroid Impact*1-in-200,000** Tsunami*1-in-500,000 Fireworks Discharge1-in-615,488

Odds of being an astronaut: 13,200,000 to 1

Odds that an American adult does not want to live to age 120 under any circumstances: 3 to 2 Odds of injury from fireworks: 19,556 to 1 Odds of injury from using a chain saw: 4,464 to 1 Odds of injury from mowing the lawn: 3,623 to 1 Odds of fatally slipping in bath or shower: 2,232 to 1 Odds of drowning in a bathtub: 685,000 to 1 Odds of being killed on a 5-mile bus trip: 500,000,000 to 1 Odds of being killed sometime in the next year in any sort of transportation accident: 77 to 1 Odds of being struck by lightning: 576,000 to 1 Odds of being killed by lightning: 2,320,000 to 1 Odds of dating a supermodel: 88,000 to 1 Odds that a celebrity marriage will last a lifetime: 3 to 1 Odds of being on plane with a drunken pilot: 117 to 1 Odds of dating a millionaire: 215 to 1 Odds of dating a supermodel: 88,000 to 1 Odds of finding a four-leaf clover on first try: 10,000 to 1 Odds of striking it rich on Antiques Roadshow: 60,000 to 1

What conclusions can we draw? people are generally more willing to accept the risk associated with something they choose to do than something that is imposed, and to accept risks that have short-lived effects rather than long-lasting ones People tend to over-estimate the risk of unfamiliar things (like flying as compared with cycling), and of things whose effect is invisible or long-term (like ionising radiation)

Gamma waves – the highest energy What has this got to do with electromagnetic radiation? There are risks involved with this too!

X-rays

What were the highest energy types of radiation? (Gamma rays are highest, then X-rays)

Electromagnetic Spectrum Radio Micro Infra-Red Light Ultra-Violet X rays Gamma Wavelength ( ) increases Can you think of a phrase that would help you remember this order? Gate X Usually Lets In Most Radiation High frequency Short wavelength High energy Most penetrating High frequency Short wavelength High energy Most penetrating Low frequency Long wavelength Low energy Least penetrating Low frequency Long wavelength Low energy Least penetrating x

Ionisation happens with high energy photons Ie x-rays or gamma rays.....you cant just add the energy of lots of infra red rays for example.

We can think of these waves like photons (particles) High energy photons can do more damage, like firing a bullet from a gun, instead of through a stone.

Demo gamma source

There is radiation around us a lot of the time......Is this a problem?

CT scan (computer tomography) (drawing a map of your insides!) This uses x-rays What are the problems? What are the benefits? Is it worth it?

How can we control our risk of radiation? Think about UV radiation? People that work with radiation like those in hospitals learn to control their risk.

Page 242 question 2, 3, 4, 6 Homework  P2_04 task 1 X- rays for thursday

Plenary  Write down in the back of your book, the types of electromagnetic radiation you know, in order of most energy to least energy

C/W 18 th October 2011 Effects of ionising radiation Keywords: gamma rays radioactive X-rays radiographer Objectives: Must – Understand the risk of using x- rays and gamma rays Should – understand the precautions you need to take with x-rays and gamma rays. Could – Understand risk, and perceived risk