Multi-frequency study of large size radio galaxies 3C 35 and 3C 284

We report multi-frequency observations of two large radio galaxies, 3C 35 and 284. The low-frequency were done with Giant Metrewave Radio Telescope starting from ∼150 MHz, the high-frequency Very Large Array. have studied morphology these sources at different frequencies. present spectral ageing map using most widely used models, Kardashev-Pacholczyk Jaffe-Perola models. Another more realistic complex Tribble model is also used. calculate jet power speed lobes galaxies. check whether any episodic activity in galaxies found no sign such activity.