For this Kick Start activity, I experimented (and drank it afterwards) science using milk, water and a torch. I followed the instructions in order to have this experiment working.
First, I found a tall glass and filled it with drinking water. Next, I added a few drops of milk. My mum helped me do that. When the milk slowly dropped down into the water, it was a stunning fusion scene. I then stirred the mixture with a chopstick. Now for the experiment to begin!
I shone the torch from above the glass and looked from the side. It did not work at first, and I figured out that the torch was too bright. I tried again, with another torch that was dimmer than before, yet still it didn’t work. I tried again, this time with a piece of paper between the torch and the glass. It worked! It was all blue, as predicted from the instructions. I looked from below. Same again, the instructions predicted the colour: apple juice snow (a yellowish tint).
Blue from the side: This happens because of colour wavelengths. If you look out to the ocean, clean water should look blue, right? So, each colour has different wavelengths, from red of the rainbow to purple of the rainbow. Red has the shortest wavelength, which means purple has the longest. The water is made of tiny things humans cannot see called molecules. They absorb most of the colours that are too short. Imagine them going nom nom nom to red, orange, yellow and green, and burp out blue and purple, which makes the water blue or purple. But they also go nom nom nom to purple as well, which is why we have blue oceans, not purple. Another fact is reflection. The sky is blue, which causes the oceans to be blue as well.
Nom nom nom means ”eat”.
The first photo shows the blue colour from a brighter torch. Second one with a dimmer torch. Third from the bottom viewing upwards.
Imagine you could find seas of your favourite colour apart from blue. Where do you think you’d find it, and would it be good or bad for us?