Stars A and B have the same absolute brightness and are the same temperature, but when you look in the sky, Star A looks dimmer. Why is this?
Star Ais closer than Star
B
Star A is farther away than Stars
с
Stars A and B are the same distance
None of the above

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.