It's AumSum Time.
Why is grass green?
Because green grass, blue sky and brown mountains look great together.
No.
First of all, we are able to see objects around us.
Because they reflect the sunlight falling on them.
Sunlight is comprised of a full spectrum of colors.
Including violet, indigo, blue, green, yellow, orange and red.
The color of an object depends on which color of sunlight it reflects.
Now, strawberries have a pigment called anthocyanin.
It absorbs all colors except red.
It reflects red.
Hence, strawberries appear red.
Coal absorbs all colors and doesn't reflect any.
So, it appears black.
Now, coming back to the question.
The grass appears green.
Because its cells have a special pigment called chlorophyll in them.
Chlorophyll absorbs colors like red and blue, and mostly reflects green.
As this reflected green color reaches our eyes, we perceive the grass as green.
Why do humans love music?
When vibrations are produced in a solid, liquid or a gas.
Our ears perceive it as sound.
When such sound vibrations are produced in specific and intricate patterns.
Then it is known as music.
Now, music neither seems to serve any evolutionary advantage.
Nor it is a necessity like food and water.
So, when researchers tried to find out why we love music.
It turns out to be because of a neurotransmitter called dopamine.
When we eat food or take drugs, the reward system in the brain is activated.
Due to which the neurotransmitter dopamine is released.
Dopamine makes us feel good.
According to the research, it is observed that when we listen to music.
The same neurotransmitter dopamine is released, thus making us feel good and love music.
In addition to this.
Researches also observed that when there were peak emotional moments in a song.
More dopamine was released, thus making us feel the emotions more intensely.
What is a black hole?
Usually, when a star is alive.
The inward force of gravity is exactly balanced at each point.
By the outward force created by hot gases and radiation.
These inward and outward forces maintain balance and hold the star together.
However, when the star runs out of fuel, there are no hot gases and radiation.
Hence, there is no outward force to balance the inward pull of gravity and thus.
The star begins to die.
The star's core begins to collapse under its own gravity.
This collapse causes the outer layers to blow apart in a huge explosion called a supernova.
Now, it is estimated that if a star has at least 20 times more mass than our sun.
Then the star collapses to form a black hole.
The surface or boundary of a black hole is called event horizon.
Nothing can escape from within the event horizon of a black hole, not even light.
Hence, the black hole appears black.
Is sitting bad for you?
Today's lifestyle makes many of us sit much more than we move around.
Hence, researchers have stated that sitting has become the new smoking.
Now, sitting for a brief time is not harmful.
But looking at the number of bones, joints and muscles in our body.
We can say that our bodies are built to move.
In addition to this.
Our skin is elastic which means it stretches and bends according to our movements.
This indicates that as our body requires movement, our skin has evolved to become elastic.
Moreover, standing or moving around does not affect our blood circulation.
And transmission of nerve impulses.
However, sitting in a specific posture for extended periods can compress blood vessels.
And nerves in various body parts, thus affecting the blood circulation and causing numbness.
Hence, the formation of our body indicates that it is built to stand against gravity.
And move around more often.
So, we should avoid sitting for too long.