Q. 154.1( 102 Votes )

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.

Answer :

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
Foundation | NTSE Most Challenging NumericalsFoundation | NTSE Most Challenging NumericalsFoundation | NTSE Most Challenging Numericals37 mins
NCERT | Light- Reflection and Refraction (Part -1)NCERT | Light- Reflection and Refraction (Part -1)NCERT | Light- Reflection and Refraction (Part -1)37 mins
Introduction to Spherical LensIntroduction to Spherical LensIntroduction to Spherical Lens42 mins
Lakhmir Singh | Light (Part-2)Lakhmir Singh | Light (Part-2)Lakhmir Singh | Light (Part-2)46 mins
Smart Revision | What is Focal Length of Combination of lenses?Smart Revision | What is Focal Length of Combination of lenses?Smart Revision | What is Focal Length of Combination of lenses?48 mins
Quiz | Introduction to LightQuiz | Introduction to LightQuiz | Introduction to Light55 mins
Rapid Fire Quiz on Reflection and RefractionRapid Fire Quiz on Reflection and RefractionRapid Fire Quiz on Reflection and Refraction49 mins
What is Refraction?What is Refraction?What is Refraction?45 mins
Quiz | Lets Revise ReflectionQuiz | Lets Revise ReflectionQuiz | Lets Revise Reflection29 mins
Foundation | Refractive IndexFoundation | Refractive IndexFoundation | Refractive Index40 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
caricature
view all courses
RELATED QUESTIONS :