Electromagnetic waves propagate at the speed of light.

Aden is a beautiful city in Yemen.

Japanese traditional culture is highly valued around the world.

The tradition of this region is very unique and popular among tourists.

We cherish the tradition that we have inherited from our ancestors.

Electromagnetic waves are a broad form of energy that includes light and radio waves.

This electrical machinery is very high performance.

The intensity of the electric field is proportional to the amount of charge.

Electrons have a negative electric charge.

Electrification is progressing even in rural areas of Japan.