Light is more mysterious thing in universe…its source might be difficult to tell, a form of energy. ..to all living beings, without light no life, no sight,no evolution may be in any part of the universe. light has got most significant role in our universe, without which evolution couldn’t be possible.
In India, we celebrate festival of light called Deepawali / Diwali .One of the major festivals of Hinduism, it spiritually signifies the victory of light over darkness, good over evil, knowledge over ignorance, and hope over despair.
The name of festive days as well as the rituals of Diwali vary significantly among Hindus, based on the region of India. In many parts of India, the festivities start with Dhanteras (in Northern and Western part of India), followed by Naraka Chaturdasi on second day, Deepavali on the third day, Diwali Padva dedicated to wife–husband relationship on the fourth day, and festivities end with Bhai Dooj dedicated to sister–brother bond on the fifth day. Dhanteras usually falls eighteen days after Dussehra.
Many of worldwide religion got importance in celebration of light.Also in Egyptian civilizations used sun has their God….Sources of light and life.The figure below has clearly shows how an Nun, the embodiment of the primordial waters, lifts the barque of the sun god Ra into the sky at the moment of creation.
If we consider a future of earth The biological and geological future of Earth can be extrapolated based upon the estimated effects of several long-term influences. These include the chemistry at Earth’s surface, the rate of cooling of the planet’s interior, the gravitational interactions with other objects in the Solar System, and a steady increase in the Sun’s luminosity.Ancient days the speed and its properties are observed on the basis of physical existence…and more clearly i can say by observing nature of light.that what we see from our eyes.
Going back to ancient days.. Newton is one of them who started to observe the light from eyes differently..what a joke all we see from our eyes only..then what different newton had seen?
confused , let me explain around 1690 AD newton started his studies on light.he used the special instrument called prism.now a days prism is common.but in 16th century,newton used it as one of great science device,to reveal the secrets of light. he saw not only light,but the color full light emerging from prism.(VIBGYOR)this is what i said.in history mankind newton is the first person to observe,such phenomenon. for today its a simple thing. and started to give his conclusions.And written his book ‘Optics’.but let me give some properties which cannot be explained by just looking through naked eyes. Light can move through vacuum, Light transports energy , same as our sun provides energy to life on any planet (if their are planets which have life other than earth ).
SCIENCE POINT : Light has angular momentum: it can rotate bodies, light being both particle and wave. It exhibits most quantum mechanical properties. Even our life sciences, polariser, particle accelerator. .work only because of light’s this special property.Light has momentum: it can collide the particles.A special property friends my future blog will be on this,light moves with other light undisturbed..Light in outer-space moves faster than all objects in this universe.. The speed of light, its true signal speed, is the forerunner speed.299 792 458 m/s is the speed of light in vaccum. and 30c.m/n.s (30 centimeter per nano seconds.1/1000000000.The proper speed of light.another one a Shadows can move without any speed limit.
Light moves in a straight line when far from matter.High-intensity light is a wave.(credit:motion mountain_relativity),Light beams are approximations when the wavelength is neglected.In matter, both the forerunner speed and the energy speed of light are lower than in vacuum.In matter, the group velocity of light pulses can be zero, positive, negative or infinite.these are the properties of light which are gifts of quantum physics.or modern physics..the era of quantum physics was began in 1905(see my previous post for more information)this changed the world into quantum world.and some property of light is very strange and it was an miracle thing for ancients,hence may be miracle must be reveled as common things.