General Knowledge - Physics - Discussion

Discussion :: Physics - Section 1 (Q.No.9)

9. 

Light from the Sun reaches us in nearly

[A]. 2 minutes
[B]. 4 minutes
[C]. 8 minutes
[D]. 16 minutes

Answer: Option C

Explanation:

No answer description available for this question.

Mahesh Verma said: (Sep 17, 2010)  
Speed of light = 3x10^8 m/s.

Distance between the earth & the Sun is = 150000000 KM.

So the time taken by light to cover this.

Distance is = 150000000000 m/3x10^8 m/s => 500 sec. /60 => 8 min. 20 sec.

Shashwat Tripathi said: (Dec 27, 2011)  
The time taken by sunlight to reach earth is 8 min. 16 sec.

Sanjaya Kumar Tunga said: (Feb 13, 2012)  
Distance of sun from earth = 150,000,000 km
Speed of light = 3,00,000 km/sec = 18,000,000km/minute
So time taken by sunlight to reach earth = (150,000,000 / 18,000,000) minute = 8.3 min

Manu said: (Apr 27, 2012)  
The sunling is very powerful and very long from our eyesight, that's why much time to reach the light from here.

Tamanna Kochar said: (Aug 1, 2012)  
Delay is due to difference in densities of layers. i.e., when sun rises at horizon its rays gets somewhat deflected due to which they have to cover more area to reach our eyes.

Nitesh Namdev said: (Oct 11, 2013)  
Distance of sun from earth = 150,000,000 km.

Speed of light = 3,00,000 km/sec = 18,000,000 km/minute.

So time taken by sunlight to reach earth = (150,000,000 / 18,000,000) minute = 8.3 min.

Payal said: (Jan 17, 2014)  
Distance b/w Earth & Sun [D]= 15*10^7 km.
Speed of light in vacuum [v]= 3*10^8 km/sec.
Let time taken by sunlight to reach earth = T.

We know that,

V=D/T or T=D/V.

That means T=15*10^7 / 3*10^8.
= 5*10^-1 sec or 5*10^-1/60 min.
= 8.3 min.

Lokesh Kumar said: (Oct 31, 2014)  
Light from the sun reaches the earth in 1 minute.

Alamthegreat said: (Jul 23, 2015)  
The light of sun reaches earth exactly at 9 minutes 19 seconds. It has increased because the light energy has decreased so it take more time reach now.

Abd'Raheem Zainab said: (Dec 24, 2015)  
So will the light energy continue to decrease? If so where are we heading to on this earth?

Jayanta said: (Feb 20, 2016)  
Is speed of light always same? Gravitational pull affects light?

Ritu said: (Mar 26, 2017)  
The time taken by sunlight to reach earth is 8 min 20 sec.

Nageshwarreddy said: (Feb 16, 2018)  
The distance between the sun and earth is not same in a year, then how can we calculate time taken for light to reach earth?

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