Khanda Yantra
Khanda Yantra is an ancient Indian astronomical instrument used for measuring the altitude of celestial bodies. It consists of a circular plate with a graduated scale and a movable arm with a sight. The arm is rotated until the sight aligns with the celestial body, and the altitude is read off the scale.
Questions
What is the primary purpose of a Khanda Yantra?
- Measuring the altitude of celestial bodies
- Measuring the distance to celestial bodies
- Measuring the angular separation between celestial bodies
- Measuring the time of day
What is the main component of a Khanda Yantra?
- A circular plate with a graduated scale
- A movable arm with a sight
- A plumb bob
- A spirit level
How is the altitude of a celestial body measured using a Khanda Yantra?
- By rotating the arm until the sight aligns with the celestial body
- By measuring the angle between the arm and the horizon
- By measuring the length of the shadow cast by the celestial body
- By measuring the time it takes for the celestial body to rise or set
What is the typical range of altitudes that can be measured using a Khanda Yantra?
- 0 to 90 degrees
- 0 to 180 degrees
- 0 to 270 degrees
- 0 to 360 degrees
What are some of the limitations of a Khanda Yantra?
- It can only be used to measure the altitude of celestial bodies
- It is not accurate enough for precise measurements
- It is difficult to use in windy conditions
- All of the above
When was the Khanda Yantra first invented?
- 5th century BCE
- 12th century CE
- 16th century CE
- 19th century CE
Who was the first person to use a Khanda Yantra?
- Aryabhata
- Brahmagupta
- Bhaskara II
- Varāhamihira
What is the significance of the Khanda Yantra in the history of astronomy?
- It was the first instrument used to measure the altitude of celestial bodies
- It was used to make the first accurate measurements of the Earth's circumference
- It was used to discover the precession of the equinoxes
- It was used to develop the first accurate calendar
How does a Khanda Yantra work?
- It uses a plumb bob to measure the angle between the horizon and the celestial body
- It uses a movable arm with a sight to measure the angle between the horizon and the celestial body
- It uses a spirit level to measure the angle between the horizon and the celestial body
- It uses a telescope to measure the angle between the horizon and the celestial body
What are some of the applications of a Khanda Yantra?
- Measuring the altitude of celestial bodies
- Measuring the distance to celestial bodies
- Measuring the angular separation between celestial bodies
- Measuring the time of day
What are some of the advantages of using a Khanda Yantra?
- It is easy to use
- It is accurate
- It is portable
- All of the above
What are some of the disadvantages of using a Khanda Yantra?
- It can only be used to measure the altitude of celestial bodies
- It is not accurate enough for precise measurements
- It is difficult to use in windy conditions
- All of the above
What are some of the modern applications of a Khanda Yantra?
- Measuring the altitude of satellites
- Measuring the distance to stars
- Measuring the angular separation between planets
- Measuring the time of day
How has the Khanda Yantra influenced the development of modern astronomy?
- It led to the development of the telescope
- It led to the development of the sextant
- It led to the development of the astrolabe
- It led to the development of the sundial
What is the future of the Khanda Yantra?
- It will continue to be used in astronomy
- It will be replaced by more modern instruments
- It will become a museum piece
- It will be used in space exploration