A collage of several photos of the submission of a homemade solar system

Light In Space

Well done to Jency, Prabhleen, Dhiya and Jahnavi for their submission showing how light travels through space. Take a look at their cover letter below:

How does light travel through a vacuum? Light waves are produced by luminous objects e.g. the Sun, and can travel through a vacuum, because they don’t need particles unlike sound waves, which travel from particle to particle. This is because they’re transverse waves, and this means that the direction of vibration in the waves is at 90o to the direction that the light travels in. The Sun emits white light, and when this light hits any sort of prism, it splits into the seven colours of the rainbow, which enables us to see different colours. The light we see is reflected off the object into our eyes. This is how we see. To see white, all colours of the rainbow are reflected, to see black all colours are absorbed. If a colour isn’t reflected, e.g. blue light was absorbed and other colours were reflected, a pair of blue shorts would appear black. Without the white light that the Sun emits, that is able to travel through space, we would only see black and wouldn’t be able to go about our life as all colours would be absorbed. This is why light that travels through space is important.

Find more submissions here.