A CD or DVD uses a laser to read information from small depressions on a disk. Which of the following would allow you to read the largest amount of information from the disk? an infrared laser. an ultraviolet laser. a laser using red light. a laser using green light.

A CD or DVD uses a laser to read information from small depressions on a disk. Which of the following would allow you to read the largest amount of information from the disk? an infrared laser. an ultraviolet laser. a laser using red light. a laser using green light.

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter10: Atomic Physics

Section: Chapter Questions

Problem 21P

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Concept explainers

Interference of Light

The word "constructive" signifies addition in interference. Constructive interference occurs when the path of the waves that start from the slit differs by 1 entire wavelength or in the intervals of the same. Hence, the waves that are presented on the screen are in phase (crest to crest/trough to trough). The waves interfering constructively forms bright fringes on the screen.

Question

A CD or DVD uses a laser to read information from small depressions on a disk.
Which of the following would allow you to read the largest amount of information
from the disk?
an infrared laser.
an ultraviolet laser.
a laser using red light.
O a laser using green light.

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