SSC
COMPUTER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What kind of laser does Blu-ray disc use?
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Blue-red laser
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Blue-green laser
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Blue-violet laser
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Purple-green laser
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Explanation:
Detailed explanation-1: -A blue laser is a laser that emits electromagnetic radiation with a wavelength between 360 and 480 nanometers, which the human eye sees as blue or violet.
Detailed explanation-2: -While current optical disc technologies such as DVD, DVD±R, DVD±RW, and DVD-RAM rely on a red laser to read and write data, the new format uses a blue-violet laser instead, hence the name Blu-ray.
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