00:02
Hello students, this question we are given that the voyager 1 that is a spacecraft that is sent to the outskirts of solar system is 125 au from earth.
00:19
So, how far is voyager in kilometers? so, to convert this au into km, you can use this conversion factor 1 and astronomical unit is equal to 1 .496 x 108 km.
00:39
So, this will be equal to 125 times that, right? 125 times, so the distance will be equal to 125 times 1 .496 x 108.
00:56
So, that will be equal to 1 .87 x 1010 km.
01:04
So, that is the distance.
01:06
This is the first part.
01:07
Now, going to the second part, how much time does it take? so, time does it take for the information to reach us? so, distance by time is the speed, right? speed.
01:21
That is the speed of light here.
01:23
So, the information will travel with the speed of light.
01:27
So, the time will be equal to distance by speed.
01:29
So, distance is equal to 1 .87 x 1010 divided by 3 x 108, that is the speed of light.
01:38
So, the time will be equal to 17 hours.
01:48
So, this will be in seconds...