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DVD uses the laser.

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in Engineering Physics II by (679k points)
DVD uses the laser.

(a) True

(b) False

The question was posed to me in class test.

My question is from Laser in portion Laser of Engineering Physics II

1 Answer

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The correct option is (a) True

Easiest explanation: A DVD player contains a laser. By moving the lens longitudinally, different depths can be reached in the disc. In order to make room for a lot of information on every disc, the beam has to be focused on as small an area as possible. This cannot be done with any other light source.

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