Blu-ray Disc

High school (ages 12+)
Science & Technology

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/blu-ray-disc

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the optical disc format?A high-density optical disc format designed for storing high-definition video and data
2. What is a Blu‑ray Disc and how is it different from a DVD?A Blu‑ray Disc is a shiny disc that can hold more movies and higher‑definition video than a DVD. It uses a blue‑violet laser and a thinner protective layer so the data can be stored much closer to the surface, giving it a bigger capacity.
3. Why do Blu‑ray discs use a blue‑violet laser instead of a red laser?The blue‑violet laser has a shorter wavelength, which lets it focus on smaller data pits and track pitches. This makes the disc store much more information, like 25 GB on one layer instead of 4.7 GB on a DVD.

High-Definition (HD) Video: Video resolution significantly higher than standard definition, offering greater detail and clarity.
Lossless Audio: Audio compression that preserves all original data, resulting in perfect sound reproduction without quality loss.
Data Density: The amount of data that can be stored in a given physical space or volume.
Optical Storage: A method of storing data on a disc that is read using a laser beam.