The laser is a tool of many talents, as the Nobel committee well knows. On Tuesday morning in Stockholm, its members announced the year’s physics prize and rattled off a short list of the technologies it has made possible: barcodes, eye surgery, cancer treatment, welding, cutting materials more precisely than a scalpel. They failed to acknowledge the whimsy it has brought cat owners, although one committee member did mention laser light shows. The laser’s resume keeps growing.