Vacuums are cold, empty spaces that make up just about all of the space in the Universe. Think about it. Imagine how far the Earth is from the Sun. Millions of miles separate the two relatively small objects. Everything between the Earth and Sun is a vacuum.
Light passes through the vacuum of space.
You've got radio waves, gamma rays, X-ray, IR, UV, visible, etc. They are all there. But if you could hold your hand out, there would be nothing. If you are a deep sea diver and you go to the bottom of the ocean, the pressure would be incredible. The pressure is enough to crush submarines.