In straight lines (well, "geodesic" might be a better term), and at the speed of light in the medium they're in.
Light can travel through undistorted
one of the properties of light is that light travel at straight line
Light travels 9,460,730,472,580.8 Km. in one year.
well it depends on what you are measuring your 'much' in. First thing is, a light year is a distance not a time. It is defined as the distance light would travel in the time of one human year. Now to define this: light travels at ~300000000ms-1 and there are 31536000s in one year, so light will travel: 300000000*31536000 = 9.5x1015 metres in one year (that is 95 followed by 14 zeros! so a long distance) so in 9.7 light years light will travel 9.2x1016 metres. Which is a very very long distance.
7
IF you meant a convex lens - light entering the lens is bent because it's passing from one medium to another - to converge at the focal point.
Light rays travel in straight lines due to the principle of the shortest path, known as Fermat's principle. Light travels along the path that minimizes the time it takes to travel from one point to another. This results in light rays following straight lines in a uniform medium.
Nobody has measured this, and it isn't even known whether a wormhole actually exist. Probably not - they are very hypothetical. The idea of a wormhole, however, is that it would let you travel instantly, or almost instantly, from one point to another, distant, point. From the point of view of an outside observer, this would let you travel much faster than the speed of light - and therefore, it would also be possible to travel backwards in time.
Light will almost always travel from one place to another along a path that takes the least amount of time. This does not imply that it will take the path involves the least distance all the time.
Refraction is the bending of light waves as they travel from one transparent medium to another, such as air to water or glass. This change in the speed of light causes the light waves to change direction at the surface between the two media.
It probably ISN'T possible, since nobody has managed to travel faster than the speed of light. However, if you travel faster than the speed of light, that is equivalent to travel to the past. That is, if from one point of view you get (for example) from here to the star Toliman in a single year (light takes about 4 years), then from another point of view you'll have traveled back in time. This would let you travel back in time first from one point of view, then back in time from another point of view; as a result, you could come back to Earth (for example), in the past. For more details, check the Wikipedia article or other sources on "Simultaneity", specifically the sections on the the Special Theory of Relativity. The Wikipedia article would be "Relativity of Simultaneity".
When waves travel from one point to another energy is transferred through the medium. Waves are periodic vibrations or oscillations in a medium that propagate through the medium carrying energy in the form of the movement. Exceptions to this are light and gravity waves, which do not require a medium for propagation.
In most cases, you do not need a license to travel from one point to another. However, if you are driving a vehicle, you will need a driver's license. If you are flying, you will need a form of identification.
The speed of light can be measured using a microwave by sending a microwave signal from one point to another and measuring the time it takes for the signal to travel. By knowing the distance between the two points and the time it takes for the signal to travel, the speed of light can be calculated using the formula speed distance/time.
An email can travel from one point on the globe to another in a matter of seconds.
Data Propagation Delay Network+ Guide to Networks
Energy cannot be transferred through a vacuum, as it requires a medium such as matter or particles to travel from one point to another. While electromagnetic radiation (such as light) can travel through a vacuum, it is the radiation itself transferring energy, not the vacuum.