The spectrum of the salts under excitation of cathode rays is a short continuous one in the blue region. This experiment shows that the cathode rays are accompanied by a stream of negative electrification. Fig. 220 shows a Crookes tube fitted with a metal plate, so that the cathode rays coming from C will strike it.
The Art Institute of Philadelphia Tuition Summary How much is tuition at The Art Institute of Philadelphia? Tuition and fees at The Art Institute of Philadelphia are $17,916 USD without financial aid. With room, board, and other fees combined, total cost of attendance is $35,703 USD. Cost & Aid
1 Average annual Community College costs are $600-$5,400. 2  Among the 21 schools accredited through the Commission on Opticianry Accreditation tuition hovers around $4,670-$9,590 for residents during the two-year program. Given twice a year, opticians may take either the National Opticianry Competency Exam or the Contact Lens Registry Examination at $150 each. 2  Certificates require renewal every three years with continued education requirements. 3  Books and supplies vary by school around $300-$800 per year.