General Knowledge - Physics - Discussion
Discussion Forum : Physics - Section 1 (Q.No. 54)
54.
Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
Discussion:
12 comments Page 1 of 2.
Nagaraj said:
8 years ago
@Rohit Bains.
The distance between the sun and earth is 149.6 million km and the distance between the earth and star is 9.46 million km. so that light from the stars takes more time to reach earth than the sun. And distance is also responsible for the twinkling of the stars, light from the starts gets refracted by air medium in the atmosphere layer. So stars may twinkle while we see.
The distance between the sun and earth is 149.6 million km and the distance between the earth and star is 9.46 million km. so that light from the stars takes more time to reach earth than the sun. And distance is also responsible for the twinkling of the stars, light from the starts gets refracted by air medium in the atmosphere layer. So stars may twinkle while we see.
K.s.kiran(AP IIIT NUZID) said:
1 decade ago
Alpha centauri is not a star but it is a star system which contains star Proxima centauri. Let me give you an example. Alpha centari is just like our solar system. Proxima centauri is star just like our the Sun. In Alpho centauri besides Proxima centauri there is another two stars. This is answer for Hitro question.
Pavneet said:
10 years ago
No, the alpha centari is not nearer to alpha centari. Light comes from earth in 8.32 minutes as it is about 149000000 km.
i.e. 3*100000 (speed of light) 8.32*60 (time taken) {by using, distance = speed*time taken}.
You can guest what is the distance between earth and alpha centari.
i.e. 3*100000 (speed of light) 8.32*60 (time taken) {by using, distance = speed*time taken}.
You can guest what is the distance between earth and alpha centari.
Sahil said:
1 decade ago
Common people it takes 8 min for light to travel from sun to earth therefore 1st two options are wrong. Now its obvious that 42 years is quite long time so therefore 4.2 is write option.
Rohit bains said:
10 years ago
Sun light takes 8 min to reach earth, then why light of alpha century which is nearer, takes more time? Can any one explain?
Nitin said:
1 decade ago
Alpha centauri is 4.37 light years from the Sun & after sun alpha centauri is nearest from the earth.
Hardik said:
1 decade ago
Alpha centauri is 4.37 light years from the Sun & after sun alpha centauri is nearest from the earth.
Hitro said:
1 decade ago
Nearest to the earth after sun. wasnt it Proxima centauri?
Pushkar said:
1 decade ago
Nearest star to the sun is proxima centauri. Is it?
Suma said:
9 years ago
I want clear explanation for this, please help me.
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