The definition of the meter (m), which is the international unit of length, was once defined by a physical artifact - two marks inscribes on a bar of platinum-iridium. Today, the meter (m) is defined in terms of constant of nature: the length of the path traveled by the light in vacuum during a time interval of 1/299, 792, 458 of a second. The Length - Evolution from Measurement Standard to a Fundamental Constant explains the evolution of the definition of the meter.
Rainbow flag (LGBT movement) For other uses, see rainbow flag. The rainbow flag is a symbol of lesbian, gay, bisexual, and transgender (LGBT) pride and LGBT social movements in use since the 1970s. LGBT symbols. The rainbow flag, commonly the gay pride flag and LGBT pride flag, is a symbol of lesbian, gay, bisexual, and transgender (LGBT) pride and LGBT social movements.
The end of the Rainbow signifies a pot of gold and the magic that surrounds your dreams coming true, and the end of the rainbow is the enchanted magical land of leprechauns. Rainbow symbolism has such a powerful meaning to each of us and graciously bestows the energy of blessings. The symbolism of a Rainbow intuitively tells us to hold onto hope, to believe beyond a shadow of a doubt that sacred blessings open to us when we are following our hearts desire.