Q.Why do moving sparklers look like a complete circle?
A.When sparklers make circles, a complete circle is seen due to retinal slowness. The light impression in the eye doesn't die before another circle's made.
A.A sparkler reaches a temperature of 2,000C, which is about 20 times the boiling point of water. A log fire can reach temperatures of up to 1,200C.
Q.How do sparklers work?
A.A sparkler consists of a chemical mixture that is molded onto a rigid wire. The mixture includes metal flakes (for sparks), a fuel & an oxidiser.
Q.What is a sparkler with regards beer pumps?
A.A 'sparkler' is a small device used in some pubs that is attached to the end of the spout. It regulates the flow of beer and results in a large head.