In an experiment to determine the focal length (f) of a concave mirror by the u - v method, a student places the object pin A on the principal axis at a distance x from the pole P. The students looks at the pin and its inverted image from a distance keeping his/her eye in line with PA. When the student shiftshis/her eye towards left, the image appears to the right of the object pin. Then,

In an experiment to determine the focal length (f) of a concave mirror

1.	In an experiment to determine the focal length (f) of a concave mirror by the u - v method, a student places the object pin A on the principal axis at a distance x from the pole P. The students looks at the pin and its inverted image from a distance keeping his/her eye in line with PA. When the student shiftshis/her eye towards left, the image appears to the right of the object pin. Then,
Answer» `x lt F` `f lt x lt 2f` x = 2f `x gt 2f`. Solution :(b) Onshifting eye to towards LEFT, the image will appear to the RIGHT of the object pin if the image distance is morre than that of object and the imag is real. This happens when the object LIES between the FOCUS centre of curvature `f lt x lt 2f`.

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