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Find the value of 'X’ and ‘h’ in the following diagram. 

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  1. X = 40 cm; h = 10 cm 
  2. X = 30 cm; h = 4 cm 
  3. X = 20 cm; h = 6 cm 
  4. X = 60 cm; h = 8 cm 

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Option 2 : X = 30 cm; h = 4 cm 
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Detailed Solution

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Given:

Position of Object for concave mirror 

Radius of curvature,R

Focal length 

Size of Object, =2cm

Concept:

The mirror formula is given by

 

 

Explanation:

 

 

 

So, value of X = 30 cm and h = 4 cm.

Hence, the correct answer is X = 30 cm; h = 4 cm.

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