What is the distance of the star in km from which a light takes 3 - 109 year to reach the earth- The speed of light- is C -3 - 108 m - s-A- 2-888 - 1022 kmB- 2-388 - 1022 kmC- 2-838 - 1022 kmD- 2-808 - 1022 km

The correct option is C 2.838 × 1022 km Time = 3 x 109 x 365 x 24 x 60 x 60 = 9.46 x 1016 s Distance = speed x time = 3 x 108 m/sx 9.46 x 1016 s = 2.838 x 1 ...

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Standard VI

Geography

Universe, Galaxies and Stars

What is the d...

Question

What is the distance of the star (in km) from which a light takes 3 x 10⁹ year to reach the earth? The speed of light, is C = 3 x 10⁸ m/s.

2.888 × 10²² km

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2.388 × 10²² km

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2.838 × 10²² km

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2.808 × 10²² km

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Solution

The correct option is C
2.838 × 10²² km

Time = 3 x 10⁹x 365 x 24 x 60 x 60 = 9.46 x 10¹⁶ s

Distance = speed x time = 3 x 10⁸ m/sx 9.46 x 10¹⁶ s = 2.838 x 10²² km

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What is the distance of the star (in km) from which a light takes 3 x 109 year to reach the earth? The speed of light, is C = 3 x 108 m/s.

The correct option is C 2.838 × 1022 km Time = 3 x 109 x 365 x 24 x 60 x 60 = 9.46 x 1016 s Distance = speed x time = 3 x 108 m/sx 9.46 x 1016 s = 2.838 x 1022 km

What is the distance of the star (in km) from which a light takes 3 x 10⁹ year to reach the earth? The speed of light, is C = 3 x 10⁸ m/s.

The correct option is C
2.838 × 10²² km

Time = 3 x 10⁹x 365 x 24 x 60 x 60 = 9.46 x 10¹⁶ s

Distance = speed x time = 3 x 10⁸ m/sx 9.46 x 10¹⁶ s = 2.838 x 10²² km