# An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what distance from the mirror should a screen be placed so that a sharp focused image can be obtained? Find the size and nature of the image.

Here, Object distance, u = -27 cm (To the left side of mirror)

Image distance, v = ? (To be calculated)

Focal length, f = -18 cm (It is a concave mirror)

Height of object, h1 = 7.0 cm

And, Height of image, h2 = ? (To be calculated)

Now, For a mirror:

Image distance, v = -54 cm

Since the image distance is minus 54 cm, therefore, the screen should be placed at a distance of 54 cm in front of the concave mirror (on its left side). The nature of image obtained on the screen is real and inverted.

Also, For a mirror,

= -14.0 cm

Thus, the size of image is 14.0 cm.

Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Introduction to Spherical Lens42 mins
NCERT | Light- Reflection and Refraction (Part -1)37 mins
Foundation | NTSE Most Challenging Numericals37 mins
Lakhmir Singh | Light (Part-2)46 mins
Smart Revision | What is Focal Length of Combination of lenses?48 mins
Foundation | How to Solve Numericals on Mirror Formula58 mins
NCERT | Power of a Lens31 mins
NCERT | Discussion on Light : Reflection and Refraction40 mins
Smart Revision | Len's Formula39 mins
NCERT | Discussion on Light - Reflection and Refraction42 mins
Try our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
view all courses