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Introduction to Light
Sources of light What sources of light can you think of?Can you distinguish between “luminous” and “non-luminous” objects? Which is the Sun? The Moon?
INCANDESCENCE Light caused by heating up a material lightbulbsburning fuel
LUMINESCENCE Light from unheated objectsThere are many different types …
fluorescence Light is emitted by substances when exposed to electromagnetic radiation More complicated: gas particles emit UV light, which make a phosphor emit light fluorescent lightbulbs
phosphorescence The ability to store energy from a source of light and then emit it slowly over a long period Like florescence, but slower glow-in-the-dark items
electric discharge Light is produced by passing electricity through the air or another gas lightning neon signs
chemiluminescence Light produced from a chemical reaction without a rise in temperature glow sticks luminol Bioluminescence is a natural form
nuclear fusion Light is released when hydrogen atoms are pressed together to form helium the sun!
An Introduction to Light. What is light? Sun is our closest star Source of all energy on Earth Energy produced by nuclear reactions in core reach Earth.
luminous object: something that produces
What is Light?.
Lesson 3. Producing Visible Light The most important natural source of light on Earth is the Sun. There are, however, other natural sources of light,
Chapter 10: Light and Reflection The phosphorescence of algae in the Salton Sea in California.
Sun- nuclear fusion Process: H + H He + Energy All elements are made like this… we are all star dust! Qualities and Applications: All colours.
Placemat Activity: Different Types of Light Unit 4: Chapter 10 – Sources and Nature of Light (p ) Artificial Genetically modified zebrafish.
WHAT IS LIGHT? The Zebrafish are emitting light when exposed to ultraviolet light. Salton Sea in California has algae that emit light giving it this glow.
Types of Light Emissions
Light and Geometric Optics
Fluorescent Materials Mrs. L. Fox. What is Fluorescence? The emission of electromagnetic radiation, especially of visible light, stimulated in a substance.
Optics is the science dealing with light and vision. Optical means ‘relating to the eye’
Properties of Light Parkland Junior High School
Lesson 2: What is Light?. Light is a form of energy that is visible. You can see it. The sun is a natural light source. Fire is another. Light spreads.
Sources of Light 1.Sun -the most abundant natural source of light on Earth -produced through nuclear fusion where hydrogen (H) combines to form helium.
What is light?. Light Visible light is a form of energy that can be detected by cells in our eyes. Visible light is a form of energy that can be detected.
What do you know about light? Think – Pair - Share.
OPTICS PHYSICS UNIT.
Technology that Produces Light 1. Incandescence – when objects are heated enough, they glow. Ex. Incandescent Light Bulbs – electricity heats up metal.
Nuclear Energy. What is Nuclear Energy? Energy that comes from changes in the nucleus of an atom. The particles in the nucleus of atoms store a lot of.
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