“Wahi jo ap barbad kar rahe hai wahi hai samah” Time is an apparently irreversible succession of existence and events from the past, present, and future. As a component quantity of various measurements it is used to sequence events, compare the length of events or the intervals between them, and quantify rates of change of quantities in material reality or conscious experience.
- Three dimensions of space, and one of time, are present.
- Although it has long been a subject of study in religion, philosophy, and science, its definition without circularity has remained a challenge for scholars.
- Physics defines time by its measurement: time is what a clock reads.
- This quantity is located in classical, non-relativistic physics (often shown as display style and, like length, mass, and charge, is a fundamental quantity.
- Mathematically, we can combine time with other physical quantities to derive motion, kinetic energy, and time-dependent fields.
- In SI, the second (s) represents the base unit. The length of a minute (min) is 60 seconds, and the length of an hour is 3600 seconds.
- During a typical calendar day, there are 24 hours or 86,400 seconds of daylight. However, Daylight saving time and leap years may alter the length of a day.
- Palaeolithic artefacts suggest that the moon was used to reckon time as early as 6,000 years ago.
- The earliest lunar calendars had years of either 12 or 13 lunar months (354 or 384 days).
- Romans switched to a solar calendar after Julius Caesar made reforms in 45 BC.
- As a result of this calendar’s intercalation, astronomical solstices and equinoxes advanced against it by 11 minutes per year.
Regarding events in space-time, general relativity examines the physical nature of time. Examples of events: a collision of two particles, supernova explosion.Such events can be coordinated and tracked.
Time, nonetheless, to an ordinary someone, is 24-hours in a single day. Since, it is limited and it must be used wisely.