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light travels from sun to earth through vaccum, so its easily understood
What else can I help you with?
What do you know about light year?
"Light year" is a distance. Specifically, it's the distance that light travels through vacuum in one year. The distance is approximately 5,878,291,000,000 miles.
In what medium the speed of light will be minimum?
The speed of light is a set speed at which all electromagnetic waves travel at in a vacuum. It is 3*10^8 meters/second... That being said, when light, or any other EM wave, travels through a medium it will slow down. Every material has an index of refraction which is the ratio of the speed at which light travels in a vacuum, to the the speed it travels in that material. If you know the index of refraction, you can use Snell's law to determine the speed light will travel through a specific medium. Every medium is different, however a rule of thumb is the denser the medium, the slower light will travel through it. For example, light travels faster in the atmoshpere than it does in water.
How fast does light travel than sound?
it is 3.5 billion times fast in a milli-second I don't know where this answer came from or what it means BUT - sound travels at roughly 700 mph in air at sea level; - light travels at 186,000 miles per second in a vacuum; - assuming we compare sound in air (as it can't travel in a vacuum) and light in a vacuum (as it can slow through a medium such as air or water), then light travels at 830,000 times the speed of sound.
Does light travel faster in a vacuum or in air?
Vaccum is basically emptiness. There is nothing in vaccum. Light can travel faster in vaccum than in any other medium because there is no obstruction for the passage of light. It is the rarest medium.
How do you know that light can go through a vacuum?
I can see the sun, the moon, and the stars.
Does light travel faster or slower when it travels in a medium?
Light travels slower through a medium. Generaly the dencer the medium the slower light travels. Light travels fastest through a vacuum assuming its speed is not being affected by gravity which also affects the speed of light. Examples. A very very thick piece of glass will appear thinner than it actually is and a streight stick will appear to bend if put into water at an angle.
How do we know that light does not need a medium in which to travel?
Because the speed of light is always constant; it doesn't change based on the movement of the source or detector or the direction in which it travels.
What travels faster in air sound or light and how do you know this?
Light travels faster in air than sound. This can be confirmed by observing the speed of light (about 186,282 miles per second) and the speed of sound (about 1,125 feet per second) in air. Additionally, light can travel through a vacuum, while sound requires a medium such as air to propagate.
How fast can light waves travel?
The sped of light is 186,000 miles per second or 300,000 kilometers per second in a vacuum. In a diamond, one of the densest trasperant objects we know light travels alot slower.
What is the proof that light travels in straight light?
Light actually travels in waves.This is known to be true because there are only 3 ways that energy can be transferred. As you probably already know, light does not need a medium to travel through because it travels through space. Electromagnetic waves are the only form of energy transfer that do not require a medium to travel through.
How do know how fast light travels?
Its speed has been measured accurately, using lasers.
How does light travel through air?
Light travels as an electromagnetic wave radiation, along with other radiation like radio and TV waves, microwaves, UV, and so on. All these are basically the same but have different frequencies. Air does not absorb light much, it is almost transparent to light unless it contains dust etc, so there is no reason why it should not travel through air. But don't confuse it with sound, sound is a compression wave in the air and is quite different to light in the way it travels.
