Science & You
BVIS HANOI (VV)
Phuong & Chi
Hi guys, long time no see. Because we are having our Lunar New Year (Tet) Holiday, we've decided to have a daily updates. It will be fun facts that you do not know of or some cool experiments. Our aim is to have two posts each day for you guys. If you can't catch up with us, just scroll down and click to the other page to find our post. Thanks for all of the support, Chi and I will try our best to give out as many things as we can!!
The first topic I would like to mention today is why can't we see in the dark? It seems to be an easy thing but it's really interesting. I came accross to this question when I turn off the light in my room. What I notice was the black colour covered the whole room, and I can't see a thing. At that time, I want to find the answer as fast as I can. And I did, the answer is simple.
In order to see, your eyes have to collect light form the objects. When you look at an object, the light from it enters your eye through the pupil. Depending on how bright the light is, the size of the pupil will be changed. Because darkness is the absence of lights, your eyes cannot collect the light from an object, that's why you cannot see in the dark.
Owls are also very different from us too. The reason why they can see in the dark and we cannot is because of their enormous size of eyes. Thus, they have a large surface area to collect light. Specialized cells (rod cells) also help them see in low light situation. Owls have many more rod cells than other animals. They also have a structure called the tapetum lucidum at the back of their eyes.
Lights come to owl's eye, hits the rod cells, hits the tapetum lucidum, and then hits the rod cells again, This turns night into day for owl.
I hope you enjoy my explanation. It would be amazing if you guys check this video out. It's a fun and easy video, which fully answers my question.
I hope you enjoy spending time with me. Stay tuned, tomorrow I will introduce you guys to this amazing thing called 3D Printer. It might not sound as interesting to you as I am, but believe me, the way it operates will amaze you!!
Best lucks,
Nam Phuong