Wave Energy
Waves are important to understand because energy travels in waves. If we are to understand energy and how to save energy we need to understand how it moves
Light: This is the first form of energy we will learn about
What is light? Is it a wave or a particle???
To find out watch this TEDED talk/lesson which runs for about 4 minutes
To find out watch this TEDED talk/lesson which runs for about 4 minutes
This next button goes into all the basic information you need to know about waves. please have a look through all the sections. Thanks to Ducksters for this excellent web page!!!
Sound energy
Sound is a form of energy.
Sound travels in waves
Sound works my making particles vibrate
Sound has to travel through something. (Called a MEDIUM)
Sound cannot travel through a vacuum or space where there are no particles
Sound is a longitudinal wave.... there are areas where the particles are squeezed together or compressed and there are areas where the particles are pulled further apart. (rarefaction)
Sound travels in waves
Sound works my making particles vibrate
Sound has to travel through something. (Called a MEDIUM)
Sound cannot travel through a vacuum or space where there are no particles
Sound is a longitudinal wave.... there are areas where the particles are squeezed together or compressed and there are areas where the particles are pulled further apart. (rarefaction)
The higher the frequency of sound, the higher the note or pitch, like a squeal or a scream
The larger the amplitude of the sound wave, the louder the sound
This clip is a 5 min clip by Salut Salon, a string and piano quartet from Hamburg, Germany, The musicians compete with each other to try and play their instruments in the weirdest way possible.
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Investigating reflection
This is a clip on how to investigate light using a simple ray box.
Rainbows
This is a short clip on how to make a rainbow at home. The clip goes on the explain about the wavelengths of light and why there are different colours in the rainbow.
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Eyes and Eye sight
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Note that the image on the retina is upside down!! Luckily your brain learns to interpret this all by itself and the brain sorts the image out so it is the right way up. Apparently babies don't get this sorted out properly at first when they start to see and so sometimes they see images one way up and then may see it the other way up. perhaps this might explain why "peek aboo" is so funny too them!
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Below is a link to a TedEd lesson: Click on it and go through the questions.
In this next button takes you to 25 cool optical illusions. "the visionary Canadian artist Rob Gonsalves is famous for creating paintings where the people or the objects in them seamlessly disappear into one another, effectively playing tricks on the mind of the viewer. More than the beautiful imagery and technique that has clearly gone into each painting, the effect which is akin to an optical illusion gives the artist the unique opportunity to portray multiple, connected stories in a single frame." The one below is an example. Explore the website and see how he does it. Thanks to the Mind Unleahsed!!
