You are waiting in the ticket line at a rock concert. originally you were 50 meters from the ticket booth and now you are only 5 meters away. what is your change in position?

here our distance is given with respect to ticket booth

initial distance is given 50 m from the booth

So our initial position is

now after this finally we reach at final position

now change in position is given as

so change in position is 45 m in magnitude and since we are coming closer to the booth so its coming negative in sign

in this image, you can see solar radiation going through ocean water.

no image, but probably absorption