A new system of units is established in which the speed of light in vacuum is chosen as unity. Express the distance between the sun and the earth in terms of the new unit of length if it is known that light takes 8 minutes and 20 seconds to reach earth from the sun.

see full answer

Talk to JEE/NEET 2025 Toppers - Learn What Actually Works!

Real Strategies. Real People. Real Success Stories - Just 1 call away

An Intiative by Sri Chaitanya

600

400

300

500

answer is C.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Here,

Speed of light in vacuum, C = 1 new unit of length $s^{- 1}$

Time taken by light of sun to reach the earth

T = 8 min and 20 seconds = $(8 \times 60 + 20) s = 500 s$

Distance between the sun and the earth

S = ct = 1 new unit of length

$s^{- 1} \times 500 s$

= 500 new unit of length

Watch 3-min video & get full concept clarity

JEE

NEET

Foundation JEE

Foundation NEET

CBSE