So my art club is hosting a haunted house sort of thing this year in the school. We used smoke machines last year and the fire department came and took them away because the smoke detector went off. This year we are trying to find a safer way. Will a dry ice machine set off a smoke detector? And can you explain how if no, I have to tell my principal about the reaction of a machine.
The speed of light in a vacuum is the same for all observers, regardless of their relative motion or of the motion of the source of the light
simply .throw a ball into a moving car.
The general theory of relativity is a geometric description of the universe providing a relationship between how matter shapes space and the shape of space influences of movement of matter. A simple conceptual example is the motion of the moon around the earth. Imagine space as a flat rubber sheet streched tight and supported at its edges. If a bowling ball is placed in the center of the rubber sheet to represent Earth, the sheet will bend like a bowl around the bowling ball. The orbit of the moon around the Earth can then be described as travelling a path inside the bowl-like depression in space around the earth. The theory of general relativity describes how space bends i.e. how the rubber sheet bends, and how matter moves in space i.e. how things move along the rubber sheet. Of course, calculations using relativitiy reveal all sorts of interesting features about how time and space interact, but those interesting features are too difficult to describe without discussing the mathematics of the theory i.e. E^2 (pc)^2 + (mc^2)^2 or the more famous form when p 0 E mc^2
I don't know what it's called, but it can definitely happen. There is an exhibit in the Museum of Science in Boston that has a glass outline of a lightning bolt that formed when it struck sand.
