Light Waves What is light Light Properties and
- Slides: 19
Light Waves
What is light?
Light Properties and Interactions
What is Light? Today our science class begins outside, as we start our investigations into “what is light? ” In your journals, make notes about your observations. How important do you think light is? Why do you say this? What sources of light do you see? In what ways does light interact with our environment? Is thermal energy transmitted through light? Why do you say this? What effect does light have on shadows? On colors? What other observations can you make about light in the world around us? Note at least 10 points & 2 sketches related to your observations
What is Light? Light is a form of energy emitted by the Sun.
What is Light? Consists of changing electricis&amagnetic Light type of fields Can travel empty energythrough that travels space or matter electromagnetic wave. as an
When Can You See Light? • The object must be a source of light itself -Example: The Sun (all stars) • Light must bounce off the object -Example: The Moon
When Can You See Light? bioluminescence – light produced by living organisms • fireflies • bioluminescent bacteria
ELECTROMAGNETIC WAVES Light is carried by electromagnetic waves.
ELECTROMAGNETIC WAVES Electromagnetic waves are waves that do not require a medium to travel. (a substance to travel through) empty space
The speed of light is the fastest thing known to scientists.
Light travels at 300, 000 km/second or over 186, 000 miles/second!
LIGHT FROM THE SUN Earth is about 150 million km or 93 million miles away from the sun.
It takes 8. 3 minutes for light to travel from the sun to Earth.
Light travels faster in the vacuum of space than it does in matter (such as air and gas)
How Does Light Travel? Light travels fast and straight! light ray – a straight-line beam of light as it travels outward from its source
Transverse Waves: Light travels as a transverse wave, in an up and down motion. http: //www. youtube. com/watch? v=UHcse 1 j. JAto&feature=player_det ailpage#t=8
Electromagnetic waves are transverse waves true or false
Compare and contrast p waves and s waves using venn diagram
Transverse waves move perpendicular
Mechanical wave and electromagnetic wave
Difference between mechanical and electromagnetic waves
What is a semiconductor used for
Difference between matter waves and electromagnetic waves
Mechanical and electromagnetic waves similarities
Surface waves and body waves
Electromagnetic and mechanical waves
Aimtoknow
What type of waves are sound waves? *
Whats a reflected sound wave
Mechanical vs electromagnetic
Seismic waves are mechanical waves
Kesler science
What are the 4 basic properties of waves
What are measurable properties
Properties of mechanical waves
Properties of mechanical waves
