What is common to all electromagnetic radiations?
They travel at the same speed in a vacuum (empty space), follow laws of reflection and refraction are not deflected by electric and magnetic fields.
All types of Electromagnetic Radiation:
i) are transverse waves and do not require a medium to travel
ii) travel at the same speed in a vacuum (empty space)
iii) follow laws of reflection and refraction
iv) are not deflected by electric and magnetic fields