Electromagnetic waves do not require .

The electromagnetic waves does not require ANY MEDIUM to propagate.

Explanation:

Electromagnetic waves are waves which has electric field property as well as magnetic field. The importance of the electromagnetic waves are that they do not require any medium in order for them to propagate. This makes it different from the mechanical waves.

The medium required for propagation restricts the waves to travel through vacuum. Electromagnetic waves can travel in space.

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19