Linterna: tambi\u00e9n conocida como soplete, es una herramienta de iluminaci\u00f3n electr\u00f3nica port\u00e1til. Una linterna t\u00edpica tiene una bombilla que funciona con pilas, un espejo de enfoque y una carcasa tipo mango para uso manual. Aunque su dise\u00f1o es bastante simple, no se invent\u00f3 hasta finales del siglo XIX, ya que tuvo que combinar la invenci\u00f3n de la pila con la de la bombilla. En sus inicios, se le llamaba "flashlight" en ingl\u00e9s porque la energ\u00eda de la pila era insuficiente, lo que significaba una luz de corta duraci\u00f3n.<\/p>\n
El principio de la linterna: un polo de la bombilla est\u00e1 en contacto con el polo positivo de la bater\u00eda, el otro polo de la bombilla est\u00e1 conectado a un extremo del interruptor y el otro extremo del interruptor est\u00e1 conectado al polo negativo del interruptor. Al presionar el interruptor, la bater\u00eda forma un circuito en serie con la bombilla a trav\u00e9s del interruptor, y la corriente de la bater\u00eda pasa por el filamento de tungsteno de la bombilla, provocando que se caliente hasta alcanzar un estado incandescente y emita luz.<\/p>\n
La distinci\u00f3n entre linternas buenas y malas:
\n1. Bater\u00eda de linterna. Existen dos tipos de bater\u00eda: de n\u00edquel y de litio, que se pueden seleccionar seg\u00fan la situaci\u00f3n.
\n2. Bombillas. Cuando la bombilla est\u00e1 apagada, es dif\u00edcil distinguir a simple vista si est\u00e1 en buen estado. Se puede apreciar la consistencia de la bombilla cuando est\u00e1 encendida.
\n3. Apertura. La apertura de una linterna LED de buena calidad es un c\u00edrculo uniforme, mientras que el punto de luz de una linterna LED de baja calidad se divide en dos colores, amarillo y azul, con una distribuci\u00f3n desigual.
\n4. Brillo. Una buena linterna LED tiene un brillo alto y una atenuaci\u00f3n lenta.
\n5. Resistente al agua. Una buena linterna LED es impermeable y resistente a los golpes, es decir, a las ca\u00eddas.<\/p>","protected":false},"excerpt":{"rendered":"
Torch: also referred to as torch, is a handheld electronic lighting tool. A typical flashlight has a battery-operated bulb and 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