Why is active transport unique compared to all other types of transport?

while active transport requires energy and work, passive transport does not. there are several different types of this easy movement of molecules. since the cell membrane will not allow glucose to cross by diffusion, are needed.

The time taken by light to reach pluto will be 5.6 hours.

The light is a electromagnetic wave that has the highest velocity and same velocity as all other electromagnetic radiations existing in this universe. The light takes about 8.2 seconds to reach from sun to earth. So lets check howmuch time does light take to reach pluto from sun.

The speed of light was calculated to be m/s. This is the speed of each and every electromagnetic waves.

The distance of pluto from sun is huge. On an average it's km or m.

So time taken by light to reach from sun to pluto will be seconds. Or actually 5.6 hours.