Lightning travels both up and down. It typically originates from the ground and travels upwards to meet the downward-moving charge from the clouds. This forms a visible lightning bolt.
Ocean waves travel in an up and down motion in a vertical direction.
Sound does not travel in a vacuum because it requires a medium, such as air or water, to propagate. In the absence of a medium, there is no material for sound waves to travel through, so sound cannot travel up or down in a vacuum.
Smell travels in all directions in the air, not specifically up or down.
In a vacuum, noise does not travel because there are no particles for the sound waves to travel through.
Sound travels in all directions within an apartment, including up and down.
Ocean waves travel in an up and down motion in a vertical direction.
lighting travels at the speed of light
Short answer: Angle. Let us assume we are illuminating a human on a theater stage. Front lighting are the fixtures that point to the front side of the human when they are standing towards the audience. Back lighting is the opposite. That means the light fixtures which are pointing to the back of the human. Cross lighting is when two, or more, lighting fixtures point at the human from varying places. For example, if there's both, front light and back light, those can be considered as cross lighting. Also, to illuminate the front side of a human completely, you usually need at least two lighting fixtures for that, one slightly to the left and one slightly to the right side of the human. This is also called cross lighting. Down lighting is light coming from up (ceiling) and going down. This is as opposed to up lighting, which is when a light fixture is on the floor, pointing upwards. Generally, most of theatrical lighting comes from up, thus being down lighting, but for a special effect, down lighting can be used too.
The lighting is always a negative charge, but it can flow both from the clouds and down, as well as from the ground and up.
Up & down, there & back. Aircraft travel in all directions.
Sound does not travel in a vacuum because it requires a medium, such as air or water, to propagate. In the absence of a medium, there is no material for sound waves to travel through, so sound cannot travel up or down in a vacuum.
Lightning travels both up and down during a thunderstorm.
Smell travels in all directions in the air, not specifically up or down.
In a vacuum, noise does not travel because there are no particles for the sound waves to travel through.
The toggle dimmer in this lighting system adjusts the brightness of the lights by toggling a switch up or down. Moving the switch up increases the brightness, while moving it down decreases the brightness. This allows you to control the level of light in the room to your preference.
Yes, you can travel with the blinds down in an RV mobile home. If you'd rather have them up, you can do that too.
About 186,000 miles per second