# Quick Answer: Does Light Travel Faster Than Sound Light Can Travel In Vacuum Sound Cannot Travel In Vacuum?

## How many light years can we travel?

13.8 billion yearsAfter a time of 13.8 billion years had passed, the maximum amount of distance that the light could have traveled would be 13.8 billion light-years..

## What material does light travel through the slowest?

Light waves do not need a medium in which to travel but sound waves do. Explain that unlike sound, light waves travel fastest through a vacuum and air, and slower through other materials such as glass or water.

## Why electromagnetic wave can travel in vacuum?

As we know electromagnetic waves are created by charges in motion or by magnetic field created by charged particles. And for the flow of field other charge carriers are required but vacuum does not contain any charged particles and how these waves are being carried forward after they have been produced from a source.

## How far can a signal travel in space?

The itsy bitsy blue dot is how far our radio signals have travelled from Earth – a diameter of about 200 light-years. The invention of radio was the work of many great minds over the course of several decades during the 19th century, but the first transmission was made in 1895.

## How fast does light travel not in a vacuum?

The speed of light in a vacuum is 186,282 miles per second (299,792 kilometers per second), and in theory nothing can travel faster than light. In miles per hour, light speed is, well, a lot: about 670,616,629 mph. If you could travel at the speed of light, you could go around the Earth 7.5 times in one second.

## Can light be destroyed?

YES, light can be destroyed , but its energy cannot be destroyed . when the energy in the light changes to another form(like heat)..you can say that light is destroyed. … If you meant destroying energy that photons possess, no you can’t destroy it. In the above example the energy is just converted into heating water.

## Is light faster than darkness?

Most of us already know that darkness is the absence of light, and that light travels at the fastest speed possible for a physical object. … In this respect, darkness has the same speed as light.

## How far can radio signal travel?

about 13,482,762,800 milesThe greatest distance for a transmission by a human-built device is currently about 13,482,762,800 miles, and growing by the minute. The greatest distance over which radio signals can be received is some hundreds of millions of lightyears; radio astronomers do that regularly. Only about 100 LY.

## Does light travel differently in a vacuum?

In contrast, light waves can travel through a vacuum, and do not require a medium. In empty space, the wave does not dissipate (grow smaller) no matter how far it travels, because the wave is not interacting with anything else. … As a wave travels from a source, it propagates outward in all directions.

## Can light travel forever?

Light is a self-perpetuating electromagnetic wave; the strength of the wave can get weaker with the distance it travels, but as long as nothing absorbs it, it will keep on propagating forever.

## Does light lose energy as travels?

It does! This loss of energy is usually officially termed a cosmological redshift, and it’s an interesting combination of the way that light moves through space, and the nature of our Universe’s expansion. Light behaves both as a particle and as a wave.

## How long would it take to travel 1000 light years?

To do so, you will need a speed of almost the speed of light, so in the reference frame of Earth, you will have spent just a tad more that 1000 yr to travel 1000 ly. i.e. 1000 years, 4 hours, and 23 minutes in Earth’s reference frame.

## What is the fastest thing in the universe?

These activities all produce or require heat. Laser beams travel at the speed of light, more than 670 million miles per hour, making them the fastest thing in the universe.

## Does light take up space?

Yes, light waves can “collide” and interact with each other (rarely), but that itself doesn’t imply that they need to occupy space. It’s not even entirely clear what it means for a subatomic particle to occupy space.

## Do radio waves weaken in space?

Some radiowaves, such as those of a short-wave frequency, bounce back off the ionosphere and are therefore poor candidates to be picked up in space. But waves like FM radio or television signals can pierce it and travel through the vacuum of space at the speed of light. … “As you go into space that power would dissipate.

## Why can light travel through a vacuum but not sound?

Light waves are electromagnetic in nature. … Thus the light can travel in vacuum. On the other hand, sound waves require a medium for their propagation. They are mechanical waves and cannot travel in vacuum.

## Can sound pass through vacuum?

IN SPACE, no one can hear you scream. Sound waves are travelling vibrations of particles in media such as air, water or metal. … So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate.

## Do radio waves travel forever in space?

Actually, radio waves travel very quickly through space. Radio waves are a kind of electromagnetic radiation, and thus they move at the speed of light. The speed of light is a little less than 300,000 km per second. At that speed, a beam of light could go around the Earth at the equator more then 7 times in a second.