A particular star is at a distance of about 8-1 - 1013 km from the earth-assuming that the light travels at 3 - 108 m - sec-find how long does light takes from that star to reach the earth-

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Standard VIII

Physics

Light Year

A particular ...

Question

A particular star is at a distance of about 8.1×10¹³ km from the earth.assuming that the light travels at 3×10⁸ m/sec.find how long does light takes from that star to reach the earth.

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Solution

The distance between star and Earth = 8.1×1013km=8.1×1013×103m[∵1km=1000m]
Since, light travels at 3×108m per second.
So, time taken by light to reach the Earth
=8.1×1013×1033×108=8.1×10163×108=8.13×108=2.7×108s
Hope this helps :)

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A particular star is at a distance of about 8.1×1013 km from the earth.assuming that the light travels at 3×108 m/sec.find how long does light takes from that star to reach the earth.

The distance between star and Earth = 8.1×1013km=8.1×1013×103m[∵1km=1000m] Since, light travels at 3×108m per second. So, time taken by light to reach the Earth =8.1×1013×1033×108=8.1×10163×108=8.13×108=2.7×108s Hope this helps :)

A particular star is at a distance of about 8.1×10¹³ km from the earth.assuming that the light travels at 3×10⁸ m/sec.find how long does light takes from that star to reach the earth.

The distance between star and Earth = 8.1×1013km=8.1×1013×103m[∵1km=1000m]
Since, light travels at 3×108m per second.
So, time taken by light to reach the Earth
=8.1×1013×1033×108=8.1×10163×108=8.13×108=2.7×108s
Hope this helps :)