Question

A light year is the distance travelled by light in one year. i.e. 1 light year= 9,460,000,000,000km.
(i) Express 1 light year in scientific notation.
(ii) The average distance between sun and earth is 1.496x1000000000 km. Compare the distance between sun and earth to 1 light year.​

Answer 1

Answer:

a)9.46x10^12 km

b)Step-by-step explanation:

Distance between Earth and Sun=1.496×10

8

km=1.496×10

11

m

Speed of light =3×10

8

m/s

By using the formula:

speed=

Time

Distance

or 3×10

8

m/s=

Time

1.496×10

11

m

So, Time=

3×10

8

m/s

1.496×10

11

m

=

3

1496

s =498.66 s