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Modified over 4 years ago
The Principles of Heat, Light, and Sound
The movement of heat is from… Hot Cold
Heat is transferred three ways… Conduction Convection Radiation
The first form of heat transfer is… Conduction
Conduction is heat transferred by contact. Source: Maybryonline.org
Examples… Mr. Hand's 8 th Grade Science Site University of Virginia Physics Department
What stops heat transfer? An Insulator.
The second form of heat transfer is… Convection
Hot rises, cold falls creating currents. “Older Than Dirt” WebQuest Think Energy (UK)
Examples of convection
The third form of heat transfer is… Radiation
Radiation is heat as an electromagnetic wave.
The wave becomes heat when it hits an object.
Examples of radiation
Sources of light…
A light source produces light.
What happens when light hits an object? The light is reflected off the object.
We see things because of reflected light. We see red, because red light is reflected; blue because blue is reflected; white because all light is reflected.
We see ourselves in a mirror because of reflection.
The light that hits an object is called the angle of incidence. The light that bounces off the object is called the angle of reflection.
Angle of incidence = Angle of reflection Molecular Expressions
When light passes thru transparent objects (water, glass, etc.), the light is refracted (bent).
When light passes thru water, it’s refracted. http://www.nature.com
When light travels thru a prism, the refraction forms the spectrum. DiscoveryEducation Clipart
The spectrum is the colors of the rainbow…
Red, Orange, Yellow, Green, Blue, Indigo, and Violet (ROY G. BIV).
Three things can happen when light hits an object.
If the object is transparent, it will pass through it.
If the object is translucent, light is diffused as it passes through it. Designbuild-Network.com
If the object is opaque, the light will not pass thru the object and is reflected.
Sound is caused by vibrations.
Sound moves out in every direction.
To have sound, you must have a medium.
If there is no medium, there is no sound.
A property of sound is pitch. Pitch is how high or low a sound is.
How much energy is used determines the volume (how loud) of the sound.
A lot of energy – a loud sound.
A little energy – a soft sound.
Light A light source produces light. Sources of light…
The Principles of Heat, Light, and Sound
HEAT, LIGHT, SOUND SCIENCE LANGUAGE AND VOCABULARY.
L ET THE LIGHT SHINE Sources of Light Luminous Produces light Incandescent Light due to high temperatures Electromagnetic Spectrum A range of electromagnetic.
Jeopardy HeatLight Sound Conduction, Radiation or Convection Color Q $100 Q $200 Q $300 Q $400 Q $500 Q $100 Q $200 Q $300 Q $400 Q $500 Final Jeopardy.
Forms of Energy Description A. Energy is involved in all physical processes and is a unifying concept in many areas of science. B. Energy exists in many.
SOL 5.3 Hosted by Ms. McKay CharacteristicsLight TravelROYGBIVMediums
Jeopardy Science Unit 2. LightReflectColorSoundWaves
Electromagnetic Spectrum Quiz
Light. All light is produced by excited atoms Excited Atoms Electrons in an energy level have a specific amount of energy If an electron absorbs energy,
HEATLIGHTSOUNDVOCABMISC. HOT, HOT, HOT!
The Principles of Heat, Light, and Sound Heat.
What is the purpose of a wave?
Slide 1 The Physics of Light Why and how do we see light? Slide 1 The Physics of Light Why and how do we see light?
Light 1. What thing reflects the most light?. A Mirror.
Physical Science: Optics Outcome C1. Properties of waves –Light is a type of electromagnetic energy which travels in a wave at the speed of 300, 000 km/s.
Light. Light: A type of energy that travels as a wave.
What is light?.
2-1: Waves and the Electromagnetic Spectrum What causes waves? What are the basic properties of waves? What does an electromagnetic wave consist of? What.
Light and Sound In this unit: 1)Properties of light 2)Reflection 3)Refraction 4)Colours.
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