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A 2.0 cm object is placed 15 cm in front of a concave mirror of focal length 10 cm. What is the size and nature of the image? (A) 4 cm. real (B) 4 cm, virtual (C) 1.0 cm, real (D) None

A 2.0 cm object is placed 15 cm in front of a concave mirror of focal length 10 cm. What is the size and nature of the image?
(A) 4 cm. real (B) 4 cm, virtual (C) 1.0 cm, real (D) None

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2 Answers

Saurabh Koranglekar
askIITians Faculty 10335 Points
3 years ago
576-2234_q.PNG
Vikas TU
14149 Points
3 years ago
Using to mirrorr formula
 v=−30cm
The image is formed at a distance of 30cm from the mirrorr on the same side of the object. It is a real image.
Lateral magnification of the concave mirrorr,
m = -v/u = h1/h0 
h1 = -4cm 
Negative sign shows that image is inverted.
The image is real, inverted, of size 4cm at a distance of 30cm in front of the mirrorr.

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