If you mean "normal speed" to be the speed at which light travels in a vacuum, then no. Anything that differs from light moving through a vacuum slows the light down to a certain extent.
You can't .
No, according to current scientific understanding, light travels at a constant speed in a vacuum, known as the speed of light, which is approximately 299,792 kilometers per second. This speed is a fundamental constant of nature and cannot be exceeded by light or any other object.
Nothing can exceed the speed of light - Einstein called it the "cosmic speed limit".
No, according to the theory of relativity, it is impossible for any particle with mass to reach or exceed the speed of light. Accelerators can increase the speed of particles to high fractions of the speed of light, but they cannot exceed it.
As far as is known nothing with mass can travel at the speed of light. There are 'things' that exceed light speed, such as wave guides, but mass or information cannot do so.
Because the angle of refraction depends (among other things) on the difference between the angle of incidence and the normal. Therefore, if if the angle of incidence is equal to 90 degrees (normal), then the angle of refraction is zero. This is the reason why images, when viewed straight-on through a window, do not appear distorted. Or, think about it like this: If light was refracted when normally incident, which way would it refract?
They don't. Nothing can exceed the speed of light. Electrons in a television travel much slower than the speed of light.
If light waves change speed as they pass from one medium into another at an angle, the light will be refracted, meaning it will bend as it enters the new medium. This bending is due to the change in speed of the light wave.
If by "straight on" you mean at 90 degrees to the surface of the medium, that is because light is only deviated if it makes an angle with the normal, which is an imaginary line perpendicular to the surface of the medium. If no angle is made between the normal line and the light ray, then no refraction occurs and the light passes through in a straight line. For more information see the related link below.
Some theories suggest that tachyons could travel faster than the speed of light, but they have not been observed. In current physics, nothing with mass can reach or exceed the speed of light.
Light bends when passing from air to glass (or vice versa) due to a change in the speed of light, which is influenced by the different densities of the two mediums. This change in speed results in the light rays refracting or bending as they enter or exit the medium to maintain the speed of light.
The speed of light is exceeded by several things. Wave guides for instance. However all present theories preclude any information or mass to exceed the speed of light. Neutrinos have never been sent through the CERN collider at super-luminal velocities.