determination of the speed of light in hindi
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Rømer's determination of the speed of lightwas the demonstration in 1676 that light has a finite speed, and so does not travel instantaneously. The discovery is usually attributed to Danish astronomer Ole Rømer(1644–1710),[note 1] who was working at theRoyal Observatory in Paris at the time.
By timing the eclipses of the Jupiter moon Io, Rømer estimated that light would take about 22 minutes to travel a distance equal to thediameter of Earth's orbit around the Sun. This would give light a velocity of about 220,000kilometres per second in SI units, about 26% lower than the true value of 299,792 km/s.
Rømer's theory was controversial at the time he announced it, and he never convinced the director of the Paris Observatory, Giovanni Domenico Cassini, to fully accept it. However, it quickly gained support among other natural philosophers of the period, such as Christiaan Huygens and Isaac Newton. It was finally confirmed nearly two decades after Rømer's death, with the explanation in 1729 of stellar aberration by the English astronomer James Bradley.
By timing the eclipses of the Jupiter moon Io, Rømer estimated that light would take about 22 minutes to travel a distance equal to thediameter of Earth's orbit around the Sun. This would give light a velocity of about 220,000kilometres per second in SI units, about 26% lower than the true value of 299,792 km/s.
Rømer's theory was controversial at the time he announced it, and he never convinced the director of the Paris Observatory, Giovanni Domenico Cassini, to fully accept it. However, it quickly gained support among other natural philosophers of the period, such as Christiaan Huygens and Isaac Newton. It was finally confirmed nearly two decades after Rømer's death, with the explanation in 1729 of stellar aberration by the English astronomer James Bradley.
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प्रकाश की गति के संबंध में रोमर के विचार
प्रकाश की गति का वास्तविक मान 299,792,458 मीटर/सेकेण्ड (लगभग 3.00 × 108 मी/से) या 670,616,629 मील प्रति घंटा है| हम सभी जानते हैं कि अल्वर्ट आइंस्टीन के सापेक्षता के सिद्धांत में भी यह कहा गया है कि निर्वात में प्रकाश की गति नहीं बदलती है।
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