CREDITS
Animation & Design: Jean-Pierre Louw (www.behance.net/Jean-Pierre_Louw)
Narration: Dale Bennett
Script: Alistair Haynes
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Light is a form of radiation that travels as a transverse wave. Light behaves in various different ways. It can be refracted and reflected. For more on this, see our video on ray diagrams (https://www.fuseschool.org/communities/148/contents/2718)
It’s important to remember that light travels in straight lines.Transparent materials allow light to pass through them… translucent materials allow some light through, but not all and opaque objects don’t let any light pass through, and so they cause shadows.
A shadow is an area where there is no light. Shadows have two regions within them; the umbra and the penumbra. The umbra of a shadow is in the center and is the darkest part of the shadow. The penumbra is an extended part of the shadow, that is slightly lighter than the umbra. The size of the umbra and penumbra depend on the size of the object and also the position of the object relative to the light source.
Think of shadow puppets. If the light is closer to your hands, the shadow becomes bigger. During a solar eclipse, the moon passes between the Sun and the Earth.Light travelling in a straight line cannot pass through the opaque moon, and so a shadow is cast on a part of the Earth. As always, the shadow has an umbra and the penumbra region. If you are standing in the umbra -
so on the part of the Earth where the sun’s light is totally blocked from reaching you, the sun will look like this in the sky.If you are ever lucky enough to witness this rare event, make sure you don’t look directly at the eclipse, as it can damage your eyesight.
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In this video you'll learn the basics about Ionic Bonds.
The Fuse School is currently running the Chemistry Journey project - a Chemistry Education project by The Fuse School sponsored by Fuse. These videos can be used in a flipped class
In this video, we are going to look at parallel lines. To find the equation of parallel lines, we still use the y=mx + c equation, and because they have the same gradient, we know straight away that the gradient ‘m’ will be the same. We then just need to find the missing y-intercept ‘c’ value.
VISI
Plants have developed responses called tropisms. A tropism is a growth in response to a stimulus; so light and water in the plant’s case.
There are different types of tropisms: Positive tropisms are when growth is towards the stimulus - so the plant growing towards the light to maximise the stimul