what is reflexion and gravity...explain it in short..
Answers
Gravity..
We barely think about gravity in our daily lives, but we must realise that it defines the way we interact with the world. We grow within its constraints, and our heart, muscles, balance system all depend on it. In this article, let us understand this essential force and its effect on us.
Every object that has mass exerts a gravitational pull or force on every other mass. The strength of this pull depends on the masses of objects at play. Gravity is what keeps the planets in orbit around the sun and the moon around the Earth. Hence, we can say that
Gravity is a force that attracts a body towards the centre of the earth, or towards any other physical body having mass.
In 1687, Sir Isaac Newton first discovered gravity. While sitting under an apple tree, he noticed an apple falling down. Then he tried to figure out why the apple instead of going up or left or right, came down. In this situation, there was clearly an unknown force at play, that force is what Newton called gravity and his theory is called Newton’s law of Universal Gravitation.
Later in the early 20th century, Albert Einstein developed a whole new idea about gravity. According to him, gravity is the warping of space and time.
hope it helps