Nature is usually silent. It does not make much sound. If you listen to the birds chirping in the morning or the evening breeze echoing in your ears, it is pleasant. But is this silence, is this beauty a result of something beautiful? The answer would be NO. To establish this world we live in, Earth has struggled a lot. It has faced a tremendous series of changes in its ecosystem and more importantly, it has been patient enough to host the life it presently has.
But is this equilibrium forever? Of course not. Internal and external disturbances are unavoidable. Luckily, I have not seen any serious external disturbance so far like the dinosaurs saw in their time. But if I talk about internal disturbances in Earth, I must have heard(and felt) many. Earthquakes and thereby generated Tsunamis, floods, volcanic eruptions, cyclones etc. are some of the imperfections in our almost perfect world. These little imperfections are not so serious if I see it from Earth’s point of view considering all those massive collisions, impacts which Earth had in it’s past. But we humans are not as strong as our bearer, we are highly sensitive to these tiny disturbances. Mankind has suffered extremely in some of these situations.
Most recently, Nepal has been a victim of an internal disturbance in Earth’s tectonic plates. What we can do? Obviously nothing. These things are bound to happen. It looks like we have to pay a price every now and then for our habitat on Earth. This universe we live in, it looks so empty and silent. But at the time when it makes some noise, it makes others cry.
Our Earth has a beautiful water cycle. The water that is evaporated from the surface of Earth is given back to it in the form of rain. Most of us like this rainy season, some consider it even romantic. Although we can not just stay inside our homes and that is why many umbrellas can be seen on the streets. This caught my attention recently and got me to a conclusion that most of the people have their umbrella exactly overhead irrespective of the rain.
This takes me back to the class on “vectors” of my junior high school when I got to know about the concept of relative velocity. The direction in which our umbrella should point depends on two things: velocity of rain and velocity of us. Usually, we neglect both of these and just put the umbrella over our head thinking we are safe enough. In most cases, we actually are right. Because the rain is usually vertical and our velocity is not that significant. But as I am in a place where the wind is strong enough to alter the relative direction of rain, so that we have to tilt our umbrellas a little to be absolutely safe. Scenario where I live should look something like this:
Strictly speaking, I am exaggerating the wind velocity to make things clear. This same situation could also be seen if the rain is vertical and you are travelling with a large velocity, say you’re on a bicycle or a motor-bike. In these cases, if your umbrella is over your head, then you’re under-utilizing it. Though it is just a small thing, but the little science that we forget to apply here, could save us from getting drenched. This is perhaps an example of the saying that science is all around us.
So, next time when it rains and you are outdoors, make sure your umbrella is pointing in the right direction to save you.
I look at the distant skies
and I think about science
We have never been there
but we know what it is like.
We know a sun that is big and hot
but in a bigger galaxy, it is just a spot,
the light we see is from light years before,
and we can not see beyond it anymore.
The world around us is huge and grand,
but without science we could never expand,
our whole life is nothing before this elegance,
we still know a little and we strive for a chance.