did-you-kno: Flashlights are so named because that used to be all they could do. When they were first invented, the batteries and bulbs in the original paper and fiber tube versions were so weak that they could only produce a short flash of light
did-you-kno: Flashlights are so named because that used to be all they could do. When they were first invented, the batteries and bulbs in the original paper and fiber tube versions were so weak that they could only produce a short flash of light