How are EM waves similar? They are all forms of light

They all have the same frequency

They all have the same energy level

Electromagnetic waves have crests and troughs similar to those of ocean waves.

Explanation:

The distance between crests is the wavelength. hope this helps you :)

r=rho l/a where a is the area, l is the length and rho is resistivity so the greater the area the lesser the resistance thats why the earth pin is thicker bcos current follow the shortest path, so less resistive .

the working equation for the angular size is the product of the physical size and 360 degrees divided by the product of two pi and distance from earth. the minimum size would be 0.559 degrees while the maximum size would be 0.49 degrees.