1. Tardigrade
  2. Question
  3. Physics
  4. In an experiment to determine the focal length f of a concave mirror by the textu- upsilon 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

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Q. In an experiment to determine the focal length $f$ of a concave mirror by the $\text{u}-\upsilon \, $ 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

NTA AbhyasNTA Abhyas 2022

Solution:

Since object and image move in opposite directions, the positioning should be as shown in the figure. Object lies between focus and centre of curvature $\text{f} < x < 2\text{f}$ .
Solution
$ \, ∴ \, $ Correct option is $\left(\right.b\left.\right)$