GENERAL KNOWLEDGE

Detailed explanation-1: -Edward Craven Walker (4 July 1918 – 15 August 2000) was a British inventor, who invented the psychedelic Astro lamp, also known as the lava lamp.

Detailed explanation-2: -As the warmed wax rises through the liquid, it cools, loses its buoyancy, and falls back to the bottom of the vessel in a cycle that is visually suggestive of pāhoehoe lava, hence the name.

Detailed explanation-3: -The whirling globs we remember are made mainly of paraffin wax, with compounds like carbon tetrachloride added to increase its density. The liquid the wax floats in can be water or mineral oil, with dyes and sparkles added for whimsy.