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CBSE Class 10 Answered

An object is kept at a distance of 15 cm from a (a) Convex mirror (b) Plane mirror The focal length of the convex mirror and the concave lens are 10 cm each. Draw the appropriate ray diagrams, showing the formation of image, in each of the three cases.
Asked by susrisangita792 | 02 Jun, 2023, 08:00: AM
answered-by-expert Expert Answer
u = -15 cm 
focal length for convex mirror, f = + 10 cm 
 
By mirror formula, 
 
1 over v plus 1 over u equals 1 over f
fraction numerator 1 over denominator plus 10 end fraction equals space 1 over v plus fraction numerator 1 over denominator negative 15 end fraction
1 over v equals space 1 over 10 plus 1 over 15
1 over v equals space 25 over 150
v space equals space 150 over 25
v space equals space plus space 6 space c m space   
 
  
 
Image formed by the plane mirror is at same distance as that of object.
Thus, if for plane mirror, object is placed at 15 cm then image will also be formed at 15 cm behind the mirror. 
 
Answered by Shiwani Sawant | 02 Jun, 2023, 07:48: PM
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