We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.

 

Answer

A concave mirror produces an erect image only when 

the object is placed between pole and focus.

 

Now,

Distance between pole and focus = Focal length

                                                      = 15cm

 

Hence, the object can be placed at a distance of less than 15 cm in front of the mirror.

Range of distance of object = less than 15cm

 

Now,

The nature of the image formed when object is placed between pole and focus of concave mirror is

Virtual, erect and enlarged 

chapter-10-class-10---light---reflection-and-refraction---teachoo.jpg

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo