FRICTION is something that limits us for 100% efficiency. What does it mean?

Means we can’t use something with zero percent energy loss. On Earth we have this loss in different ways such as: Humming loss, Air resistance, Heat loss and much more.

But what about space? Do we also suffer from such losses in space also, specially friction force?

So, the answer is YES. The reason is simply this that we all know space is empty, there is nothing. So, by this concept there should be no loss.

But actually it is not like that, space in reality is not empty. There are Fields, there is Light, there are Microscopic particles.

These things also effect the movement. But there effect is count as negligible.

So, the correct information about FRICTION in space is this that actually friction acts in space but we consider it as negligible.

THE MYSTERY: Speed Of Light

Almost everybody knows the value of c that is 300,000 Km/sec. Means just impossible to even imagine.

On earth, it is not possible for something to achieve the speed of light. But if let us suppose an object moving with c then what’s about the object?

So, the strange thing is this that the object will disappear, but why?

The answer for its invisibility is cleared by the concept of LENGTH CONTRACTION. It provides us a relation between the rest length, its velocity and between speed of light.

By this concept, we get the approximate lenght of an object moving with speed of light as ZERO.

Hence, light is the biggest mystery even now. As, we didn’t get any visible object till now moving with c.

What’s the need of MODERN PHYSICS?

Classical physics is fully capable in explaining the motion of bigger objects or the objects we can see through our naked eyes on earth.

But when we know about other objects like qunata particles and celestial bodies. These are not adjusting with our theories, for studying them we introduced a new PHYSICS and that is known as MODERN PHYSICS.

That’s the peak from where our PHYSICS is divided into two parts that is classical and modern.

Can time be relative?

The anwser is YES it can.

But how?

Guys for that we will have a tour to moon. Now imagine a shooting star seen by you from moon and the same shooting star seen by your friend from earth. The time of disappearing of star is different.

Why size is RELATIVE not ABSOLUTE?

The answer in the easiest way is take three fruits: WATERMELON, Orange, and a grape. Now, just put these in front of you and think that for grape, the orange is bigger in size, but the same orange is smaller in size for the watermelon.

This simply indicates that the size depends on the viewer and hence it is relative.