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DVDs and Blu-ray disks store information in patterns that are read by laser light. The shorter...

DVDs and Blu-ray disks store information in patterns that are read by laser light. The shorter the wavelength of the light, the closer the data tracks can be placed on the disk.

Part A

A Blu-ray player uses violet light; a DVD player uses red light. Which disk can store more information?

Drag the terms on the left to the appropriate blanks on the right to complete the sentences.

Terms:

DVD

Violet

Red

Blu-ray Disk

400nm

700nm

Sentences to fill in:

The wavelength of red light is around BLANK, whereas the wavelength of violet light is around BLANK. Since BLANK light has a smaller wavelength the data tracks on a BLANK can be spaced closer together and the BLANK can store more information.
science   physics   
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