A concave mirror of focal length 30 cm is placed on the flat horizontal surface with its concave side up. Water with refractive index 1.33 is poured into the lens. Where should an object be placed if its image is to be captured on a screen with a magnification of 2?

Explanation

To solve the problem step by step, we need to find the object distance \( x \) so that the image formed by the concave mirror has a magnification of 2 when water is poured into the mirror.

### Step 1: Understand the given data
- Focal length of the concave mirror, \( f = -30 \) cm (negative because it is a concave mirror).
- Refractive index of water, \( \mu = 1.33 \).
- Magnification, \( m = 2 \).

### Step 2: Determine the apparent object distance
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