Question 3 - MCQs from NCERT Exemplar - Chapter 10 Class 10 - Light - Reflection and Refraction

Under which of the following conditions a concave mirror can form an image larger than the actual object?

(a) When the object is kept at a distance equal to its radius of curvature

(b) When object is kept at a distance less than its focal length

(c) When object is placed between the focus and centre of curvature

(d) When object is kept at a distance greater than its radius of

curvature

Answer

A concave mirror forms images larger than the object (with M agnification > 1 ) when the object is placed between C and F. 

• When the object is placed between C and F, the image is formed beyond C . 
• This means v > u.  
• Since magnification, m = -v/u, and v > u, it is clear that |m|>1
• The image formed is larger than the object. 

So, the correct answer is (c)