Which electromagnetic wave has wavelengths ranging from the size of a printed period to the length of a pen (1×10-3 to 1×10-1 meters)?

Microwaves are a form of electromagnetic wave. They have wavelengths ranging from 1 mm to 0.1 m ( or 1 x 10^(-3) m to 1 x 10 ^(-1) m ).

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.