Imagine you are standing in front of a mirror, facing it. Raise your left hand. Raise your right hand. Look at your reflection. When you raise your left hand your reflection raises what appears to be his right hand. But when you tilt your head up, your reflection does too, and does not appear to tilt his/her head down. Why is it that the mirror appears to reverse left and right, but not up and down?

• Since rising head up & down takes place in one axis(single dimension).But hand moving takes place in two dimensional axis opposite to each other
• 11 years agoHelpfull: Yes(10) No(2)
• srry in the previous ans i missed a NOT:
  
  since the image formed by plane mirror is 180 degree rotated across vertical axis
  and "NOT "across horizontal axis
• 12 years agoHelpfull: Yes(6) No(0)
• since the image formed by plane mirror is 180 degree rotated across vertical axis
  and across horizontal axis
• 12 years agoHelpfull: Yes(4) No(1)
• It is because of the lateral inversion property of the mirror. Which can easily be proved
• 11 years agoHelpfull: Yes(4) No(0)
• A person's left or right in space depends onhis position or to where he's facing.
  Our body is symmetric about the line joining the head and leg.
  So head and leg alog with front is the reference,about which we decide where our right or left is.
  A person's top is always in the direction above head or that is away from the body
  But we can't say where a person's left or right is.It depends on to where he's facing.
• 11 years agoHelpfull: Yes(3) No(1)
• for moving hands : the direction of the reflection for every action has to be the same as the object, and for having the same direction , it has to take the opposite side as it is a reflection on 180*.
  
  for head's up and down, the direction is the same and also in the opposite side but we cant see it as
  it is at a reflection of 180*.but if we observer the movement of ears, than we can identify the same as moving our hands. as head is a single object part and hands are two object part to compare side.
  
• 8 years agoHelpfull: Yes(0) No(0)