Communicating Through Light and Color
Dive into the fascinating world of communication through light and color, exploring topics such as the visible spectrum, rainbow formation, and reflection. Discover how rainbows are made, the colors of the rainbow, and how light behaves when mixed. Engage in practical activities like creating a permanent rainbow and understanding the science behind reflection. Uncover the secrets of telecommunications, fiber optics, and satellite communication.
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Presentation Transcript
Starter task Think of all the ways we communicate with each other Do you know how rainbows are made?
Now write the title in your jotter Light the visible spectrum
We will be learning about The electromagnetic spectrum The visible spectrum Waves outside the visible spectrum
Telecommunications How fibre optics work How radio signals travel
Extension tasks How do our computers communicate with each other How do satellite phones work
The visible spectrum White light Not as simple as you think! In our everyday life this happens when rainbows form ROYGBIV
Make a permanent rainbow to keep! Add some water to the tray Now place your black paper in the tray Add a drop or two of clear nail varnish to the water Wait a few seconds you will see the rainbow form Now really carefully pick up the paper taking it out of the water keep it flat and you should pick up the rainbow! How dry the paper with the hair dryer
Starter task What is the scientific name for the rainbow of colours? (Clue: VS) Name all the colours of the rainbow? What colour light do we get when we mix all the colours of the rainbow?
Mixing light Stick the picture in your jotter and we will label the light colours with their scientific names.
Practical work applying your maths learning to science When light hits a shiny surface it bounces back this is called reflection This is how we see ourselves in mirrors because the image bounces back at us As a class shine the ray box at the mirror along the 10 line What do you notice about the angle that it shine at compared to the angle that is bounces back at (reflects) Repeat shining the light along 20 , 30 , 40 , 50 ,60 , 70 , 80 90
Practical work Prove that light travels in straight lines Shine the torch/ lamp at the desk Now how can you stop the light getting to the desk What do you see? This is proof that light cannot go round corners! You can make a shadow puppet if you want and use the light mixing equipment to play
What you need to remember White light is made of all the colours of the rainbow We can split white light using a prism (or raindrops) The primary colours of light are blue, green and red The light we can see is called the visible spectrum
Some extra number facts Light is the fastest thing known to humans and it travels at a speed of 186000 miles per second (you could go 8 times round the earth in a second in that time!) If light hits a surface it will bounce off at the same angle that it hit the surface the law of reflection
