In an experiment to determine the focal length of a concave mirror by the method, a student places the object pin A on the principal axis at a distance from the pole P. The student looks at the pin and its inverted image from a distance keeping his/her

Question

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 student looks at the pin and its inverted image from a distance keeping his/her eye in line with PA. When the student shifts his/her eye towards left, the image appears to the right of the object pin. Then, [2007]

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(2)

As shown in the figure, when the object (O) is placed between F and C, the image $(I)$ is formed beyond C. It is in this condition that when the student shifts his eyes towards the left, the image appears to the right of the object pin. Object O lies between focus $(f)$ and centre of curvature $(2 f)$ $f < x < 2 f .$

Solution

1 $x < f$

2 $f < x < 2 f$

3 $x = 2 f$

4 $x > 2 f$

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Solution

1 x<f

2 f<x<2f

3 x=2f

4 x>2f

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1 $x < f$

2 $f < x < 2 f$

3 $x = 2 f$

4 $x > 2 f$