How does the amount of energy in the batteries compare to the total amount of light given off by the flashlight?
Well more chemical energy in a battery means more energy can be converted to light energy.
I believe that the light will last longen and\or be brighter.
How could you use a flashlight to test two different brands of batteries to see which brand had more energy?
Well what you would do is you would put the first brand of batteries in the flashlight and you would time how long the batteries lasted and right it down . Then put the second brand of batteries in the flashlight and turn on the flashlight and time the flashlight and see how long the batteries lated and wright it down and you have your answer .
How does the amount of energy in batteries in a flashlight compare to the total amount of energy given off by the flashlight as light and heat?
There is more energy in the battery than that given off as light and heat for two reasons. 1) Some energy is lost due to resistance in the battery. As current flows, energy is lost to heating of the battery due to this internal resistance. 2) As the battery operates, the voltage falls until it is too low to heat the bulb to incandescence. Yet energy remains in the battery, but this last energy is…
Can the amount of radiant energy that shines out of a flashlight exceed the chemical energy stored in the batteries?
This depends entirely on the efficiency of the lamp. Tungsten lamps tend to give off more heat than light, whereas LED technology give off more light than heat. By the laws of thermodynamics the sum of the energy that comes out of the system must equal the sum of the energy that goes into the system. So: Energy in batteries = Total light energy produced + Total heat energy produced The efficiency therefore becomes the…