A concave mirror is moved towards a distant tree and an inverted image of the tree and an inverted image of the tree on a screen at 15 cm,then the focal length of the mirror is......................
Answers
Answered by
4
Concave mirror forms the inverted image of an object at infinity(in this case, the distant tree) at the focus. So the focal length of the mirror is 15cm.
Or with sign, focal length is -15cm.
Or with sign, focal length is -15cm.
Similar questions