Why blue laser is better than red laser, used in Blu ray disc and DVD respectively ?
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blue-violet laser used in Blu-ray disc, which has a shorter wavelength (405 nm) than red laser used in DVD and can store more data than DVD.
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They both use blue-violet laserwhich has a shorter wavelength (405nm) than red laser used in DVD and can store more data than DVD .The storage capacity of Blue ray disc is five times more than DVD disc .
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