Tarun got to know that the next nearest star to us is Alpha Centauri and is at a distance of 4 light years from the Earth. What does it mean?

Light has to travel 48 months to reach that star.

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Light has to travel 40 years to reach that star.

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Light has to travel 43 months to reach that star.

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Light has to travel 4 months to reach that star.

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Solution

The correct option is A
Light has to travel 48 months to reach that star.

Light year is the distance light travels in one ‘Earth year’ which has 12 months in it. It is given that Alpha Centauri is 4 light years away from us. It means light has to travel 4 years or 48 months to reach that star.

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Q. Tarun got to know that the next nearest star to us is Alpha Centauri and is at a distance of 4 light years from the Earth. What does it mean?

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.

Tarun got to know from his elder brother that sun is the nearest star and is approximately 150 million kilometers away from the earth. He wanted to know which is the next nearest star and what is its distance from the earth. His tutor told him that the nearest star is alpha century and is at a distance of 4.3 light years from the earth. Tarun does not know what a light year is. Can you tell him?

Question 174

A particular star is at a distance of about $8.1 \times 10^{13} k m$ from the Earth.
Assuring that light travels at $3 \times 10^{8} m$ per second, find how long does light takes from that star to reach the Earth?

(a) How much time does light take to reach us from the sun?

(b) How much time does light take to reach us from the next nearest star 'Proxima centauri'?

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Tarun got to know that the next nearest star to us is Alpha Centauri and is at a distance of 4 light years from the Earth. What does it mean?

The correct option is A Light has to travel 48 months to reach that star. Light year is the distance light travels in one ‘Earth year’ which has 12 months in it. It is given that Alpha Centauri is 4 light years away from us. It means light has to travel 4 years or 48 months to reach that star.

The correct option is A
Light has to travel 48 months to reach that star.

Light year is the distance light travels in one ‘Earth year’ which has 12 months in it. It is given that Alpha Centauri is 4 light years away from us. It means light has to travel 4 years or 48 months to reach that star.