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Light Waves: Light travels as waves. These are transverse waves, like the ripples in a tank of water. The direction of vibration in the waves is at 90° to the direction that the light travels.Light travels in straight lines, so if you have to represent a ray of light in a drawing, always use a ruler.Unlike sound waves, light waves can travel through a vacuum (empty space). They do not need a substance to travel through, but they can travel through transparent
and translucent substances.The table summarises some similarities and differences between light waves and sound waves: To help understand this more you can watch this video! i have provided on the left side of the page! Our experiment on light waves! |
Our experiment with light waves and different colours!
Experiment: As you can see we experimented with the prisms again, but this time we put different colour gels in front of the light and we came out with some amazing photo's and i personally love the blue gel over the camera because my favourite colour is blue!
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Ray DiagramA ray diagram shows how light travels, including what happens when it reaches a surface. In a ray diagram, you draw each ray as: a straight line with an arrowhead pointing in the direction that the light travels also when you go to draw a ray diagram remember to use a ruler and a sharp pencil!
Playing around with the Apeture!Here we can see how i've played around with the apeture, and as you can see on the left image we have a large apeture which lets in more light for an exposure yet on the right image its a lot darker and this is because we have a small apeture and this has a smaller opening in the lense diaphgram to let in less light for a given exposure!
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Colour WavesLight is made up of wavelengths of light, and each wavelength is a particular colour. The colour we see is a result of which wavelengths are reflected back to our eyes.
To understand this better you can watch this video! Playing with different colour gels! |
RGB SystemScientists recognize the light primaries of red, green and blue. When combined, red and green light rays produce yellow, blue and green produce cyan, red and blue produce magenta. Red, green and blue mix to create white,
Playing around with the shutter speed! |