Prime objective of this lecture is to present on X-Rays. here briefly describe on Yohkoh X-Ray Pictures and Arcade of loops. “An “arcade” is a system of magnetic loops organized into an elongated cylindrical formation. Often such an arcade will result from a slowly-developing solar flare or a coronal mass ejection (or both). The bright arcade may persist for days or longer.” X-Rays are an electromagnetic wave of high energy and very short wavelength, which is able to pass through many materials opaque to light.