- Is the flashlight beam traveling faster than the speed of light?
Firstly, you can "almost" travel at speed of light, but never reach it. In that situation, all the actors would see the flash light traveling at the speed of light, independently on their speed. The light, always goes at speed light, independently on the speed of the viewer. If a car goes at 80 mph and you also goes at 80 mph, you will see the car stopped, but the light always goes at speed light relative to all viewers. That is one of the most strange things of relativity theory!!
- I find flashlight ray is better at night than in the day, why?
You can see a distant flashlight better at night, because it isn't overwhelmed by atmospheric diffusion of sunlight. But since air is usually stiller at night (less convection from sun-warmed surfaces, less disturbance from traffic), it has less particulate matter, so absorbs less of the light.
- My flashlight does not work suddenly,what happened?
Maybe there is something wrong with your flashlight. You should check the following reasons.
1.The light bulb is burned out, the light bulb is the end of the line for the energy released by the battery.
2.The battery could be bad, the battery stores energy required to make technology work.
3.The wires connecting the battery and the light bulb could be bad.