Short trick of Electromagnetic Spectrum in Order and with discovery

Short trick of Spectrum Raju and Mohan Is Visiting Umesh X – Girl friend Home
1.R : Radio   (Discovered  Heinrich Hertz. in  1880 and   Radio  wave  frequency 104 and 1011 or 1012 Hz, used long-distance communication.)
2.M : Microwaves (Microwaves discovered by Percy Spencer)
3.IInfrared (Infrared discovered by  Frederick William Herschel)
4.VVisible (discovered visible light Isaac Newton)
5.U : Ultraviolet (who discovered Ultraviolet Johann Ritter)
6.X : X-Rays (discovered x-rays Wilhelm Conrad Roentgen)
7.G : Gamma Rays (discovered Gamma Rays Paul Villard)