Math, asked by Qzxy, 10 months ago

If the light travels at a speed of 3.0 ×10^5 km per second,the light from a star which is 8.1×10^3 km away from the earth takes __ to reach the surface of the earth

Answers

Answered by punya0306
0

Answer:

3.0 multiply by 8.1

3.0 multiply by 8.1 = 5.4

Answered by sanjeevk28012
0

Answer:

The time taken by light from star to reach the earth is 0.027 sec

Step-by-step explanation:

Given as :

The distance between light from star to earth = d = 8.1 × 10^{3}  km

The speed of light from star to earth = s = 3 × 10^{5} km/s

let The time taken by light from star to reach the earth = t sec

According to question

Time = \dfrac{Distance}{Speed}

or, t = \dfrac{d}{s}

Or, t = \dfrac{8.1\times 10^{3}}{3\times 10^{5}}

Or, t = 2.7 × 10^{3-5}

∴   t = 2.7 × 10^{-2} sec

So, The time taken by light from star to reach the earth = t = 0.027 sec

Hence, The time taken by light from star to reach the earth is 0.027 sec Answer

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