Question

How can we calculate 150 million kilometres in light years?

Answer 1

distance travel light travels in 1 second is equal to 3 lakh kilometre so in one year light travels 300000 *3600*24*365 km divide 150 million by this to obtain light years

Answer 2

Answer:

1.58548 × 10^-5 light years

Explaination:

150 million km = (150 × 10^6) × 10^3 m = 1.5 × 10^11 m.

Speed of light = 3 × 10^8 m/s

1 light year = Distance travelled by light in 1 year.

Light travels 3 × 10^8 m every second.

In one year, there are 60 × 60 × 24 × 365 = 3.1536 × 10^7 seconds.

Hence, 1.5 × 10^11 m in light years:

[1.5 × 10^11 ÷ (3 × 10^8 × 3.1536 ×10^7)]

= [1.5 × 10^11 ÷ (9.4608 × 10^15)]

= 1.58548 × 10^-5 light years