Are transverse and congressional waves the two types of mechanical waves?

Answer 1

mechanical waves can be both transverse and longitudinal, but all electromagnetic waves are transverse.

Answer 2

Transverse mechanical waves will pass through any mechanical medium. That included solids and fluids, the latter, the fluids, will included liquids and gases. A mechanical wave transfers its energy into the medium through which it is going to travel. An easy-to-see example is a classic one, so let's look at that. A stone tossed into a still pond creates transverse waves on the surface that radiate from the point where the rock hit the water. The waves moves out while the water moves up and down to carry the energy of the wave. The medium, the water, moves up and down, which is across the path of travel of the wave. The wave is moving out away from the stone's point of impact, and the water moves in a transverse way, moves up and down, or across an arrow pointing in the direction the wave's energy is moving. The secondary or S wave of an earthquake is also a transverse wave, and it causes the ground to move up and down. The gases can be made to move transversely to carry the energy of a wave, too. It's harder to see with them, but let's give it a shot. Imagine standing in a large empty room with "fog" on the floor from lots of dry ice. The "white gas" you see is still for this experiment, and you have in your hand a pillow. If you lower the pillow so it just goes into the top of the "mist" layer and then move the pillow up and down slowly, you'll get the same effect as if you were moving the pillow up and down on the surface of a calm pond. In the case of the gas, the white "mist" will behave just like a liquid, and there will be ripples moving slowly out away from the pillow across the room.

Answer 3

False. Compressional.