what led when magnifying lens was invented
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as magnifying lens is used to magnify object.
it is also helpful in reading letters
it is also helpful in reading letters
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A light-emitting diode (LED) is a semiconductor device that emits visible light when an electric current passes through it.
The magnifying glass was developed by Roger Bacon in the 13th Century.
The magnifying glass was developed by Roger Bacon in the 13th Century.
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