All about Physics and Mathematics

Shout out to my newest followers! Excited to have you onboard! Jacey Lyn Manning, Mody Leury, Sherifdeen Adeniyi Oluwamomi, Jörg Praetorius, KyLee Fancher, Swapnil Mulik, Ilya Margulis, Charles Chirwa, Abbas Yusuff, Sabyasachi Banerjee, Suren Kumar, James Osas, SI Vineeth Venugopal, Munir Zaidi, Ibrahim Baloch, Lodewyck Phiri, Felipe Oliveira, Ahmad Hashim, Rich Boat, Muhammed Yousuph Richest, Ezhilarasu Ezhil, Ugba Raymond, Chamika Nuwan, Tinotendablackangel Victor Raphael Chingongodzamabhunu, Ruchir Sahoo, Er Amrendra Mehta Aips, Ginney Bhai, Peters-elegbede Joshua Olaoluwa, Aarif Rana, Martin Declan Saka, Hanuman Solanki, Jaf Sha, Twinkle Gupta, Chauhan Sanjeev, Sathish Kumar, Mihir Kumar Bag, Livio Polisano, Ahmed Amer, Prafulla Pote, Roy Donald, Rajasekhar Balasani, Kshounish Baksi, Manik Lal, Enumaje Ondugbe Emmanuel, Zahir Ali, Ali Mumtaz Shigri, Er Ayush Saxena, মুস্তাফিজুর রহমান সেপ্টু, Farhan Yunas, Ольга Хаурдінова

Which of the following are not electromagnetic waves?
(A) Cosmic rays (B) Gamma rays
(C) Beta rays (D) X - rays

Solid state physics