Philosophy and Science are deeply related. Ideas precede inventions. Philosophers generate ideas and scientists shape them. The two functions might be combined in one person or more. The founders of Western scientific thought were also philosophers. So were the Indians. Indian scientists were called Ashvins.
The Beginning of Physics
Today the text books on Physics tell that matter lays in three states, that are solid, liquid and gas. This statement tells the condition of matter at some particular time only. The forms and shapes can change. The properties of different kinds of matter are the subjects covered under the Science of Physics.
Vedas were the first text books on Physics. The compiled knowledge about matter and its properties came to humans originally through the text of Vedas that provided the first, foremost and subtle knowledge about basic elements (Panch Bhuta) of Nature – Earth, Water, Fire, Wind and Ether; out which rest of the things have come in to existence. The process of acquiring knowledge about the composition of different things, properties, and establishing cause to the effects has been a continuously ongoing process.
Vedanga and Vedanta carried forward the studies in Physics. Upanishdas, Darshana Shastras and Puranas are the sources that contain mantras explaining properties of various natural phenomena and link causes to the effects. All Mantras are not meant for spiritual development. Most of them contain vast knowledge in compressed form, like zipped files, and need further expansion.
Format of Texts
Those days even the scientific writing was also done in poetic Chhandas, economized within the given structure of the metric measure. That served as an aid for memorizing. Mostly the style of writings was either in ‘Ode’ format. The author ‘addressed’ the ‘Subject’ and narrated the properties and utilities before seeking the effect. Another style used in ancient texts was a dialogue between the Rishi and disciples. This style offered explanation with examples also.
Example of the knowledge content
Atharva Veda is mostly devoted to Physics. It stated that there are seven fundamental elements of matter. Those are (1) Dhara (Earth), (2) Jala (Water), (3) Teja (Fire), (4) Vayu (Wind), (5) Khitija (Horizon), (6) Tanmatra (Quantity) and (7) Ghamanda (Ego).
Further, every kind of matter is possessed by three Gunas (qualities) of (1) Satvik, (2) Rajasik and (3) Tamsik. That implied that all matters can cause beneficial, dormant and harmful effects.
By different permutations and combinations of seven fundamental matter and three Gunas, 21 more products could be formed.
Likewise, another Treatise Vaisheshika Darshana Shastra lists out Prithavi (Earth), Jala (Water), Agni (Fire), Vayu (Wind), Akasha (Horizon), and adds Kala (Time), Disha (Direction), Atma (Soul) and Mana (mind).
The properties of those are briefly explained below:-
Prithavi- Earth element has qualities of smell, shape, taste and touch, out of which smell is most significant.
Jala – Water qualities are Taste, Touch and shape. Taste is most significant. Presence of Water is identified through coolness in matter. The warmth in Water denotes the presence of Fire element.
Agni – Fire element has qualities of shape and touch, out of which shape is most significant.
Vayu – Wind element has distinct quality of touch.
Akasha – Ether element has qualities of sound. It is formless, but where ever sound can be heard, presence of this element is confirmed. Ear drums are the recipients of this property.
Kala – Time causes origin, state and destruction of everything. For practical interpretation, it has been conceptualized into hours, days, months, age, present, past and future.
Disha – For practical application there are ten directions that have been conceptualized for the origin, existence and expiration of matter.
- These are four cardinal points East, West, North and South.
- Four corners North East, South East, South West, and North West.
- Two sides, Surface and Bottom
Atma – Awareness is the sign of Atma. Awareness is not the identity or qualification of senses, because previous knowledge continues to stay even after destruction or mal- functioning of the sense that had acquired knowledge in the past. It implies that Atma experienced knowledge and is separate from senses. Desire, feelings, efforts, comfort and discomfort are separate from body and are the identity of Atma.
Mana – It is a tool to experience various sensory feelings.
The above illustrations depict that spirituality has been neatly blended with the subject of pure science Physics. It is not necessary to use only European terminology to look authentic. Explaining subtle scientific facts through artistically woven mythological stories has been the hall mark of Hindu religion.
Scope of Hindu Scriptures
Scientific gems are lying scattered throughout in Hindu Scriptures like Vedas, Vedangas, Vedants Purans and Epics. Modern physics confirmed that the Sun’s rays travel in a curved way, but not in a straight line. The same fact our ancestors had artistically explained through mythology that seven horses tied by snakes drew Sun’s chariot. As the movements of the snakes are crooked and curved, so also are the sun’s rays. This phenomenon has been poetically described in scriptures:
भुजंगनः मितः सप्तः तुर्गः
Similarly the Atharva Veda explained another scientific truth about Sunlight that there are seven colors in the white ray of the Sun. Sun rays contain blend of seven colors:
सप्तः सूर्य्स रसम्यः।
Contribution of Indian Scientists
In the realm of physics, Indian scientists have made remarkable contributions.
- Rishi Kanada, the founder of the Vaisesika system of philosophy, expounded that the entire matter in this world consisted of atoms, as many in kind as there were various elements. About light he explained that light and heat are variations of the same reality. He is the fore-father of Atomic Science. Jain thinkers went a step further. They thought that all atoms are the same kind and variety emerged because they entered into different combinations.
- Sushrut explained that we are able to see the objects around us due to the light falling on them. Aryabatta also supported his views later. In contrast, Greek scientists held the view that objects are seen because of light in the eyes.
- Varahmihir in sixth century explained how shadows were cast.
- Chakrapani was the first to explain that light and sound traveled through waves, but the speed of light was many times faster than the sound waves.
- Pratispda further elaborated that sound waves travelled in the shape of concentric circles and every sound wave has a corresponding echo.
- Vachaspati interpreted light as composed of minute particles emitted by substances striking the eyes. This is a clear anticipation of the corpuscular theory of light, which was proposed by Newton, but was rejected till the discovery of the proton.
Gravitation and Astro-Physics
The theory of gravity found its existence in Yajur Veda that explains that the Earth is kept in space owing to the superior attraction of the Sun. Scholars of the Gupta period were already acquainted with the movement of the heavenly bodies, the reasons for eclipses of the Sun and the Moon.
- Aryabhatta put forward a brilliant thesis regarding the Earth’s rotation on its axis. As regards the stars being stationary, Aryabhatta stated that starry vault was fixed, but the earth moving round its axis, again and again caused the rising and setting of planets and stars. He also described the Polar days and nights of six months duration. Aryabhatta affirmed the diurnal revolutions of the earth on its axis. He wrote that when the sun rose in Sri Lanka, it was midday in Yavakoti (Java) and midnight in the Roman land. Yavadvipa, a Sanskrit name mentioned in the Ramayana, to which Sugriva sent search parties looking for Sita, was the ancient name of Java. As regards to the size of the earth, he calculated the circumference of the earth as 4,967 Yojanas and its diameter as 1,581 1/24 Yojanas. A Yojana is equal to five English miles, and the calculation tallies with modern calculations. The circumference of the Earth works out to be 24, 835 miles, with its diameter as 7, 905 5/24 miles. He also wrote a textbook Aryabhatta Siddhantafor working out astronomical calculations. Even today, this data is used in preparing Hindu calendars (Panchangs) giving most accurate results.
- Brahmagupta, (598 AD – 665 AD) is known for introduction of negative numbers and operations on Zero in Arithmetic. His main work was Brahmasphuta Siddhanta, which was a corrected version of an old astronomical treatise Brahma Siddhanta. From his time the Hindus were aware of the length of diameter and circumference of the earth.
- Varahamihira in 6th century produced valuable material relating to Astronomy, Geography and Mineralogy in his work Brihat-Samhita. It is stated that one half of the moon, whose orbit lies between the sun and the earth, is always bright by the Sun’s rays; while the other half is always dark by its own shadows, like the two sides of a pot standing in the sunshine. Explaining eclipse of the Moon and Sun, he wrote that Moon enters into the Earth’s shadow; and in Solar eclipse the same thing happens to the Sun. He further explained the commencement of a lunar eclipse does not take place from the Western side. The solar eclipse does not take place from the Eastern side. He gave the calculation of eclipses; independent of any reference to the mythological ‘Rahu Ketu’ episode.
- Bhaskaracharya knew the law of gravitation. In a verse in Sidhanta Shiromani, he held that the Earth is endowed with the power of attraction. It drags with own power heavy objects on the sky. It appears that objects are falling but actually they are not, they are only being dragged by the power of attraction of the Earth. When everything on the sky drags each other equally there is no question of objects on Earth to fall. It is explained that Earth, planets, stars, Moon, and Sun – each of them is being dragged by the other with its respective power of attraction and as a result of this attraction none of them is removed from their axis. This theory was deliberated in the Siddhanta Shiromani centuries before Newton was born. According to Brahmagupta and Bhaskaracharya the diameter was calculated to be 7182 miles, some calculated that to be 7905 miles, while modern scientists take it to be 7918 miles. Bhaskara is renowned for his concept of Tatkalik-agati (instantaneous motion).
Last but not the least, none of the Hindu scientists suffered the fate of poor Galileo for making new discoveries.
Chand K Sharma
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