Laser

laser classification: We have not been using our old laser because it was a Class 3B, and therefore banned in secondary schools under the older code of practice.

Now, in the ARPANSA Use of Radiation in Schools, Radiation Protection Series Publication No. 18, June 2012, page 79, it says, "Some lasers that were previously Class 3B now belong to Class 1M or 2M, as they are considered safe for viewing with the naked eye."