Answer :
If the image formed by a lens for all positions of an object placed in front of it is always erect and diminished, the nature of the lens is concave lens.
Ray diagram justifying the same is as follows:
Given: Power of the lens (P) is -10D (since concave lens hence negative sign is introduced).
Therefore focal length (f) is calculated in the following way:
Hence the focal length is -0.1m or -10cm.
Rate this question :
How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
Related Videos
Final Mock Test44 mins
Final Mock Test44 minsTry our Mini CourseMaster Important Topics in 7 DaysLearn from IITians, NITians, Doctors & Academic Experts
view all courses
Dedicated counsellor for each student
24X7 Doubt Resolution
Daily Report Card
Detailed Performance Evaluation
RELATED QUESTIONS :
If the image form
Xam idea - ScienceThe image of an o
All In One ScienceList the sign con
All In One ScienceAn object is kept
All In One ScienceA 2.0 cm tall obj
Together With ScienceA 5 cm tall objec
Together With Science<span lang="EN-US
NCERT - Science ExemplarName the physical
Lakhmir Singh & Manjit Kaur - PhysicsThe magnification
Xam idea - ScienceHow far should an
All In One Science