Which statement is correct light can travel in a vacuum?
Answer Expert Verified The correct statement is: Light can travel in a vacuum, and its speed is constant if the source is moving or stationary. Light isn’t effected by a vacuum.
What is correct about light in vacuum?
Light, in a vacuum, travels at the same speed even if the light source is moving. Light, given off from a moving source will travel faster in a vacuum. C.
How can light travel?
Light waves travel out from their source in straight lines called rays. Rays do not curve around corners, so when they hit an opaque object (one that does not allow light to pass through it), they are blocked from reaching the other side of that object.
What is the lifespan of a photon?
The particles that make up light, photons, may live for at least 1 quintillion (1 billion multiplied by 1 billion) years, new research suggests. If photons can die, they could give off particles that travel faster than light. Many particles in nature decay over time.
Is photon a stable particle?
Physical properties. A photon is massless, has no electric charge, and is a stable particle. In a vacuum, a photon has two possible polarization states.
What happens if a photon stops?
So according to the quantization rule, stopping a photon is not possible. If we try to stop the photon then the photon will disappear and its energy will be transferred to some other material or object. We know that this process takes place in solar cells.
What stops a photon?
Photons move at the speed of light because they have no inherent mass to slow them down. Because they have no inherent mass, they can’t really be stopped per-se, because a photon that wasn’t moving would have no basis to even exist – really all a photon is depends on its movement.
How does photon die?
When energy moves from an electromagnetic form to other forms, then photons are destroyed. The field vibration then falls away as the energy is transferred. We summarise the process by saying that the photon has been absorbed. Or, if you like, the photon ‘dies’.
Can you slow down a photon?
Scientists have long known that the speed of light can be slowed slightly as it travels through materials such as water or glass. However, it has generally been thought impossible for particles of light, known as photons, to be slowed as they travel through free space, unimpeded by interactions with any materials.
Do photons slow down in a medium?
When light travels through a medium other than vacuum, it will be slowed down. For instance, when light propagates through water or air, it will do so at a slower speed. That’s due to the fact that light scatters off the molecules that make-up different materials. The photons themselves do not slow down.
Does light travel slower through water?
Light travels at approximately 300,000 kilometers per second in a vacuum, which has a refractive index of 1.0, but it slows down to 225,000 kilometers per second in water (refractive index of 1.3; see Figure 2) and 200,000 kilometers per second in glass (refractive index of 1.5).
Why does light travel slowly in water?
Yes. Light is slowed down in transparent media such as air, water and glass. The ratio by which it is slowed is called the refractive index of the medium and is usually greater than one.