For about 20 years after its invention it had few practical uses; then suddenly it revolutionized grocery checkouts & home audio

For about 20 years after its invention it had few practical uses; then suddenly it revolutionized grocery checkouts & home audio . Jeopardy is one of the most viewed shows worldwide and their questions are really funny and tricky too. Some of the questions are really hard to be solved, thats why we are providing here the correct answers.

For about 20 years after its invention it had few practical uses; then suddenly it revolutionized grocery checkouts & home audio

ANSWER: THE LASER

Here you will find the whole solution of the group Final Jeopardy 07-29-2022 Answers.