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What is Time? Video Lecture - Class 3

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1. What is time?
Ans. Time is a concept that refers to the ongoing sequence of events that occur in an irreversible and continuous manner. It helps us measure the duration or intervals between these events.
2. How is time measured?
Ans. Time is commonly measured using various units such as seconds, minutes, hours, days, months, and years. These units are based on the Earth's rotation, the Moon's orbit, and the Earth's revolution around the Sun.
3. Can time be perceived differently by different individuals?
Ans. Yes, time can be perceived differently by different individuals. Factors such as age, cultural background, and individual circumstances can influence one's perception of time. For example, time may seem to pass more quickly for a child compared to an adult in the same situation.
4. Is time a physical entity?
Ans. Time is not considered a physical entity but rather a fundamental dimension in which physical events occur. It cannot be touched or directly observed, but its effects can be observed and measured in relation to other physical entities and phenomena.
5. Can time be influenced by gravity or speed?
Ans. According to Einstein's theory of relativity, time can be influenced by gravity and speed. Higher gravitational fields or faster speeds can cause time to pass slower compared to lower gravitational fields or slower speeds. This phenomenon is known as time dilation.
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