Isaac newton

Isaac newton

This led him to state that color is a property of the light beam, arguing that light is composed of multiple particles that can be detected (now named photons). He also discovered that the color of objects comes from reflected light which is already colored rather than it being colored by the object.

Newton famously used prisms to study light. He discovered that white light gets decomposed into color light depending on the angle in which the beam enters the prism. He also discovered that, using another prism to align all those colors, white light could be reconstructed.

OPTICS

Force also increases the more acceleration (a) you have.

Newton published a book called The Principia. In it, he described how forces affect objects and how movement works. He explains it using three laws:

Second law

First law

Force is bigger the more mass you have. As an example, the more muscle you have, the stronger you are. The more weight you have, the heavier you become.

An object will remain static or in movement unless a force impulses it or slows/stops it.

MOTION AND MOVEMENT

When you apply a force towards something, that something applies an equally strong force against you. When you kick a boxing sack, not only are you hitting it, but an opposite force pushes you with the same strength you applied to the sack.

Third law

Based upon his laws of motion, Newton started studying the movement of celestial bodies. He coined the term gravity to refer to the force that keeps us binded to Earth.

Laws of gravity

He proposed that all objects with mass have gravity, and therefore will pull other objects with mass towards them. Multiple objects with mass will attract each other mutually (so not only does Earth attract the Moon, but the Moon also attracts the Earth). This is dependent on distance: the farther away you are, the weaker the force becomes.

FIRST

Mass also affects the force. The more mass you have, the more that you pull other objects. That’s why all objects fall at the same speed regardless of their weight: a feather gets fairly attracted to Earth because, having so little mass, poses insignificant resistance against Earth’s gravity, but it also makes it attract Earth very faintly, so the mutual attraction is not too strong. A lift, on the other hand, is heavy enough to pose resistance against Earth’s pulling, but its mass also makes it pull the Earth more strongly than the feather, balancing it out.

sECOND

With enough acceleration and speed, you can surpass gravity and float, just like a cannonball when is shot, or you when you jump. Being too close to Earth and having air slowing you down, however, is what makes you fall at the end.

THIRD

If you travel at enough speed to surpass gravity, and at enough distance so the forces of attraction between Earth and you get balanced, you can spin across the planet indefinitely. It is essentially falling, but because the forces are balanced, you never land, so you just keep spinning. This is called an orbit, and is the principle behind the moon spinning around Earth or the planets around the sun.

FOURTH