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The star Sirius is about 8.1×10^13km from the Earth. Assuming that light travels at speed of 3.0×10^5 km per second, find how long light from Sirius takes to reach the Earth.( give answer in seconds)
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hey mate correct answer is
Speed = distance / time
==> time = distance / speed
Given :
distance = 8.1 × 10¹³ km
speed = 3 × 10⁵ km/s
time = distance / speed
= 8.1 × 10¹³ km / 3 × 10⁵ km/s
= 2.7 × 10 ¹³⁻⁵
= 2.7 × 10⁸s
The time will be 2.7 × 10⁸s
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