With everything around us moving pretty quick, people become curious, how fast does light travel? How fast does sound travel?
There are many things that travel way quicker than the normal human eye can fathom, such as light and things that we can see, such as a cheetah sprinting behind its prey.
So we will talk about the speed of everything that seems curious and worth knowing. Let’s begin with one of the fastest things known to mankind, the speed of light.
Speed of Light
The speed of light in a vacuum is 186,282 miles per second(299,792 kilometers per second) and there is nothing that can travel faster than light yet in theory.
The speed of light in miles per hour is 670,616,629 mph. If you could travel at the speed of light, you could go around Earth 7.5 times in a second.
Albert Einstein coined a constant ‘c’ that is equated to the value of 3×106 m/s and this is used in scientific equations.
However, the speed of light can change depending on the medium it travels in. Light is known to reflect on and refract in various materials and this can impact its speed. Although, in vacuum, where there is just a void space, light is invincible and maintains a constant speed.
Speed of Sound
Have you ever wondered how fast your voice or any sound takes to reach a certain distance?
The speed of sound is also heavily affected by the medium it travels as well as temperature. In a room of 20℃(68℉) the speed of sound in about 343 meters per second or 1,235 km/r(1,125ft/s, 767 mph or 667kn) or a kilometer in 2.9s and a mile in 4.7s. Sound travels 1,1471 m/s in water, almost 4 times faster than it travels in the air.
The speed of sound refers to the speed of sound waves in a general medium, that is, the air.
Speed of a Meteor
Asteroids that are present in various orbits and collide with other particles and travel in space to reach Earth’s orbit and end up as a meteor. Once the meteor reaches Earth’s surface, it becomes a meteorite.
The speed of an asteroid traveling in space increases as soon as it is attracted by Earth’s gravity. Any asteroid or potential meteorite orbits the Sun at 25 kilometers per second. Any meteor being pulled by Earth’s gravity can have a speed ranging between 11 kilometers per second and 72 kilometers per second(7 to 44 miles per second).
Speed of a Bullet
You must have seen bullets being fired in movies and games. Have you ever wondered how fast they actually travel?
Before we talk about numbers, let’s have a look at what a bullet contains. A normal bullet has three main parts–the primer, the propellant and the bullet metal. The gun’s trigger fires a pin into the back of the bullet, igniting the primer which, in turn, ignites the propellant and releases the bullet metal through the gun’s barrel.
The fastest bullet travels at 2,600 feet per second(1,800 miles per hour).