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Energy in Our Life
Miroslav Hruška Czech Republic
Electromagnetic radiation …is a form of ENERGY
Forms of E-M radiation radio waves microwaves infrared radiation visible radiation (light) ultraviolet radiation X-rays gamma rays
Electromagnetic waves wavelength - in metres frequency - in hertz
Wave formula wave speed = = frequency x wavelength c = 300,000,000 m/s the higher frequency the lower wavelength
Differences in sources in penetrability in impact on people in use
Microwaves - oven
Microwaves - communication
Microwaves - radar
Thermal radiation infrared radiation visible radiation = light ultraviolet radiation
Thermal radiation - sources Sun and other stars light bulb hot oven infrared heater melting iron hot lava
Thermal radiation formula The hotter a body is, the shorter wavelengths it emits, and the more energy it looses.
Infrared radiation - use thermography night vision infrared heating remote control
Infrared radiation - thermography
Infrared radiation – night vision
Light from 390 nm to 790 nm
Light spectrum prism spectrum
Light - spectroscopy spectral analysis => chemical composition
Laser Light Amplification by Stimulated Emission of Radiation
Laser – optical recording CDred laser 780 nm DVDred-orange 650 nm Blu-ray“blue” (violet) 405 nm
UV radiation UVA 315-390 nm UVB 280-315 nm UVC 100-280 nm
Gamma rays – in medicine
Electromagnetic radiation © Miroslav Hruška, 2012
Electromagnetic Spectrum. -is the range of all possible frequencies of electromagnetic radiation. The "electromagnetic spectrum" of an object is the characteristic.
Electromagnetic Spectrum The EM Spectrum What do a radio, heat lamp, the Sun, and an X-ray Machine have in Common? – All four transmit energy.
Energy Kinetic Energy Potential Energy.
The Electromagnetic Spectrum Contents: The Spectrum Basic Concepts Whiteboards.
Electromagnetic Spectrum. Different Types of Light Light is a form of energy It travels in waves Also called Electromagnetic Radiation Some Electromagnetic.
1 Electromagnetic Spectrum “EMS”. Electromagnetic Spectrum Types of radiation that travel in waves 7 types of EM radiation (from lowest to highest frequencies)
Electromagnetic Spectrum. The colors we see only represent a small portion of the electromagnetic spectrum The colors we see only represent a small portion.
Section 2: Waves of the Electromagnetic Spectrum Objectives: list and compare different types of electromagnetic waves describe how the electromagnetic.
Ch. 17 ELECTROMAGNETIC SPECTRUM Electromagnetic waves Are made of changing electric and magnetic fields EM waves DO NOT need a medium to travel
The Electromagnetic Spectrum1 Wavelength/frequency/energy.
Electromagnetic spectrum. Visible light λ ≈ 700 nmλ ≈ 420 nm.
Flame Test and the EMS. Absorption and Emission of Light in a Flame When a substance is heated in a flame, the substances electrons absorb energy from.
The Electromagnetic Spectrum Scripps Classroom Connection
Electromagnetic Waves Chapter 17 Section 1-2 Pages
Electromagnetic Spectrum yuan-sen-ting yuan-sen-ting.
4-1 Radiant Energy. Waves Light travels in Waves similar to ocean waves Light waves are electromagnetic and consist of an electric and magnetic fields.
Electromagnetic Waves. Electromagnetic Spectrum.
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.
Chapter 12 Sections 1 & 2. Electric and Magnetic Fields An electric charge is surrounded by an electric field A moving electric charge produces a.
Look out answers to Page 21, Q. 24, 26, 28 and 30.
The Electromagnetic Spectrum
What is Light? Light is a kind of ______________________. Light travels in transverse waves. Speed of Light (c) = 3.00 x 10 8 m/s Speed of Light (c) =
Bell Ringer What is the Geocentric Universe? What is a Heliocentric Universe?
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 Waves Spectrum Foldable
Chapter 12 Sections 1 & 2. Warm Up: How is an electromagnetic wave created? How is an electromagnetic wave different from a mechanical wave?
Sound waves transfer energy through vibrations. Sound Produced by vibrations Mechanical waves Vibrate particles Medium affects sound waves. (p. 42) Temperature.
1.All electromagnetic waves travel at the same speed through space (the speed of light) 2.Gamma rays, X-rays, Ultra-violet waves, Light, Infra-red rays,
A QUICK REVIEW COMMON MISSED PROBLEMS ON THE QUIZ.
Physical Science 18.2 The Electromagnetic Spectrum Reading Guide
Effects of Electromagnetic Waves
Electromagnetic Spectrum Fill in the blanks on the notes page!
Ast October 2007 The Nature of Light (This topic is a little out of order; we’ll return to the Solar System later)
Electromagnetic Waves All electromagnetic waves are transverse waves. They do not require a medium to travel through. All types of electromagnetic.
The Electromagnetic Spectrum Oooh…aaah. What is it? A spectrum is a RANGE of things The Electromagnetic Spectrum (EM Spectrum) is a RANGE of electromagnetic.
The Electromagnetic Spectrum A continuous range of oscillating electric and magnetic waves. The energy in an electromagnetic wave increases as the frequency.
I. Electromagnetic Waves
The Study of Light. The Electromagnetic Spectrum includes gamma rays, X-rays, ultraviolet light, visible light, infrared radiation, microwaves, and.
Do Now: 1.If you could solve one problem using science, what would it be? 2.What branch of science do you think you would need to use to solve the problem?
Electromagnetic Waves Waves that DO NOT require a medium to travel Can travel through a vacuum – empty space Waves that carry all types of light energy.
The Properties of Light Connor Oi Kennysen Cheong.
Warm Up Write the correct answers for the following: 1) 2.00 x m = __________m 2) 1.23 x m = __________nm.
Electromagnetic Waves. Electromagnetic wave is a wave that can travel through empty space or through matter and is produced by charged particles that.
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