Question

Sun's radiation is similar to that of a blackbody

Answer 1

yes sun's radiation is similar to that of blackbody

Answer 2

Black-body radiation is the thermal electromagnetic radiation within or surrounding a body in thermodynamic equilibrium with its environment, or emitted by a black body (an opaque and non-reflective body). It has a specific spectrum and intensity that depends only on the body's temperature, which is assumed for the sake of calculations and theory to be uniform and constant.