The Concept of the White Dwarfs in Indian Astronomy

Description: This quiz will test your knowledge about the concept of White Dwarfs in Indian Astronomy.
Number of Questions: 14
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Tags: indian astronomy white dwarfs indian astronomical beliefs and mythology
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Which ancient Indian text contains the earliest mention of a White Dwarf?

  1. Rigveda

  2. Atharvaveda

  3. Yajurveda

  4. Samaveda


Correct Option: A
Explanation:

The Rigveda, the oldest of the four Vedas, contains the earliest mention of a White Dwarf, known as 'Shukra'.

What is the Sanskrit term for a White Dwarf?

  1. Shukra

  2. Budha

  3. Guru

  4. Shani


Correct Option: A
Explanation:

The Sanskrit term for a White Dwarf is 'Shukra', which means 'bright' or 'shining'.

According to Indian astronomy, what is the nature of a White Dwarf?

  1. A hot, dense star that has exhausted its nuclear fuel

  2. A cool, dense star that has exhausted its nuclear fuel

  3. A hot, gaseous star that is still burning nuclear fuel

  4. A cool, gaseous star that is still burning nuclear fuel


Correct Option: A
Explanation:

Indian astronomy describes White Dwarfs as hot, dense stars that have exhausted their nuclear fuel and are no longer undergoing fusion reactions.

What is the approximate size of a White Dwarf?

  1. The size of a small planet

  2. The size of a large planet

  3. The size of the Sun

  4. The size of a grain of sand


Correct Option: A
Explanation:

White Dwarfs are typically about the size of a small planet, such as Earth or Mars.

What is the approximate mass of a White Dwarf?

  1. The mass of the Sun

  2. The mass of a small planet

  3. The mass of a large planet

  4. The mass of a grain of sand


Correct Option: A
Explanation:

White Dwarfs have masses comparable to that of the Sun, despite their small size.

What is the surface temperature of a White Dwarf?

  1. Very hot (above 10,000 K)

  2. Very cold (below 10,000 K)

  3. Moderate (between 10,000 K and 100,000 K)

  4. Extremely hot (above 100,000 K)


Correct Option: A
Explanation:

White Dwarfs have surface temperatures that can reach tens of thousands of Kelvin, making them very hot.

What is the fate of a White Dwarf?

  1. It will eventually cool down and become a Black Dwarf

  2. It will eventually explode as a Supernova

  3. It will remain a White Dwarf indefinitely

  4. It will merge with another White Dwarf to form a neutron star


Correct Option: A
Explanation:

Over time, White Dwarfs will gradually cool down and eventually become Black Dwarfs, which are hypothetical objects that have cooled to the point where they no longer emit any significant radiation.

What is the significance of White Dwarfs in Indian astronomy?

  1. They are considered to be the final stage in the evolution of stars

  2. They are believed to be the remnants of ancient supernovae

  3. They are associated with certain deities and astrological influences

  4. All of the above


Correct Option: D
Explanation:

White Dwarfs hold significance in Indian astronomy as they are considered the final stage in stellar evolution, remnants of supernovae, and are associated with deities and astrological influences.

Which Indian astronomer made significant contributions to the study of White Dwarfs?

  1. Aryabhata

  2. Bhaskara II

  3. Varāhamihira

  4. Brahmagupta


Correct Option: A
Explanation:

Aryabhata, an influential Indian astronomer and mathematician, made significant contributions to the study of White Dwarfs, proposing that they are the remnants of massive stars that have undergone a supernova explosion.

In Indian mythology, which celestial body is associated with Shukra, the White Dwarf?

  1. Venus

  2. Jupiter

  3. Saturn

  4. Mars


Correct Option: A
Explanation:

In Indian mythology, Shukra, the White Dwarf, is associated with the planet Venus, which is known as 'Shukra Graha' in Sanskrit.

What is the approximate density of a White Dwarf?

  1. 100,000 times that of water

  2. 10,000 times that of water

  3. 1,000 times that of water

  4. 100 times that of water


Correct Option: A
Explanation:

White Dwarfs have extremely high densities, approximately 100,000 times that of water, due to the immense gravitational forces acting upon their compact mass.

Which of the following is NOT a characteristic of White Dwarfs?

  1. They are supported by electron degeneracy pressure

  2. They are the remnants of massive stars

  3. They are composed primarily of carbon and oxygen

  4. They are extremely luminous


Correct Option: D
Explanation:

White Dwarfs are not extremely luminous, as they have exhausted their nuclear fuel and no longer undergo fusion reactions. They primarily emit heat from their residual thermal energy.

What is the Chandrasekhar limit?

  1. The maximum mass a White Dwarf can have before it collapses into a neutron star

  2. The maximum mass a neutron star can have before it collapses into a black hole

  3. The maximum mass a star can have before it undergoes a supernova

  4. The maximum mass a black hole can have before it evaporates


Correct Option: A
Explanation:

The Chandrasekhar limit is the maximum mass a White Dwarf can have before it collapses under its own gravity and becomes a neutron star. It is approximately 1.4 solar masses.

What is the approximate lifespan of a White Dwarf?

  1. Billions of years

  2. Trillions of years

  3. Quadrillions of years

  4. Quintillions of years


Correct Option: B
Explanation:

White Dwarfs have extremely long lifespans, estimated to be in the trillions of years, as they gradually cool down and fade over time.

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