A point object is placed 60 cm from the pole of a concave mirror of focal length 10 cm on the principal axis.
Find:
a. the position of image.
b. If the object is shifted 1 mm towards the mirror along principal axis, find the shift in image. Explain the result.

Explanation

To solve the problem step by step, we will use the mirror formula and the concept of magnification to find the position of the image and the shift in the image when the object is moved.

### Step 1: Identify the given values
- Focal length of the concave mirror (f) = -10 cm (negative because it is a concave mirror)
- Object distance (u) = -60 cm (negative because the object is in front of the mirror)

### Step 2: Use the mirror formula
The mirror formula is given by:
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