Explanation
The wavelength of blue-green should be between the wavelength of blue light and green light. The wavelength of blue light is about 450 nm and the wavelength of green light is at about 500 nm.Midway between these wavelengths is 470 nm.
Battery companies make impressive claims about how long their batteries will last. A student decided to test the running time of different batteries to determine which battery lasts the longest. The student tested 6 different batteries, 4 brand name and 2 generic, using flashlights. The results show that the battery referred to as Name Brand A lasted the longest, with 101 hours of runtime:
Flashlight | Battery | Runtime in hours |
Gearlight Super Light | Name Brand A | 101 |
SureFire | Name Brand B | 99 |
Maglight | Name Brand C | 80 |
Bright Star | Name Brand D | 75 |
SureFire | Generic A | 30 |
Bright Star | Generic B | 29 |
It could be argued that this experiment was not set up using proper experimental protocol. What would need to change in the experiment for the results to be valid?