Question

a new unit of length is chosen such that the speed of light in vacuum is unity. what is the distance between the sun and the earth in term of the new unit of light takes 8min and 20sec to cover this distance?​

Answer 1

500 Units

Given:

Time = 8 min 20 seconds

Converting time in terms of seconds:

= 8 x 60 + 20

= 480 + 20

= 500 seconds

The Speed of light in Vacum is unity

= 1 unit/second

To Find:

Distance between the sun and Earth

Formula used to find distance:

Distance = Speed x Time

Substituting the values which we know into this formula we get:

Distance = 1 x 500

Distance = 500 units

Therefore, the distance between the sun and earth is 500 units.

Answer 2

Given,

Time = 8min 20seconds. = 500 seconds

To Find:-

.Distance between sun and earth.

Calculations:-

Distance = Speed×Time

The speed of light in vacuum= 1unit/sec

Time = 500

Distance = 1×500

=500units

Explore more:-

Speed:- Speed is the distance traveled per unit of time. It is how fast an object is moving.

• Speed is the scalar quantity that is the magnitude .

• Speed is a vector quantity.

Speed = $\frac{Distance}{Time}$

• SI unit of speed is m/s

Speed of Light :-

• Speed of light in vacuum is denoted by "C".

• It is a universal physical constant.