Question

7. "The distance of a star from the earth is 8.33 light
minutes.' What do you mean by this statement ?
Express the distance in metre.​

Answer 1

Explanation:

since light year is the distance travelled by light in one year

light minutes is also a distance travelled by light in one minute

the above statement means

the distance of a star from earth is equal to distance travelled by light in 8.33 minutes

.....actually distance travelled by light in one minute = 3×10^8×60

= 18 × 10^9 m

in 8.3 min = 18 ×8.3 ×10^9 =149.4 ×10^9

so distance of star from earth is

1.49 ×10^11 m

Answer 2

Hey there!

The statement 'The distance of a star from the earth is 8.33 light minutes' means that the light from the star takes 8.33 minutes to reach earth.

Given,

Speed of light = 3 * 10^8 m/s

Distance covered in 1 sec = 3 * 10^8

Time taken = 8.33 min = 8.33 * 60 s

Distance = speed * time = 3 * 10^8 * 8.33 * 60 = 1.5 * 10^11 m

Hope It Helps You!