Call 1800-123-2003
User login
Call 1800-123-2003
Our Schools
SabariGiri Residential School
"Smartindia is the best online tool for school students." Ms Deepa Chandran, Principal Anchal
M. G. M. Model School
"Smartindia is one of the best supplementary education tool for school students." Ms Pooja, Principal
Read More
Demo Video
Take a Demo Exam
Ask a Teacher
Who invented Canal rays? |
| In 1886 Eugen Goldstein discovered what he termed Kanalstrahlen, or canal rays, also called positive rays, these are positively charged ions that are accelerated towards and through a perforated cathode in an evacuated tube. |
