Q. 225.0( 1 Vote )

(a) Draw a ray di

Answer :

(a)


When an object is placed any-where between infinite and optical center of a concave lens, the image formed is


(i) Between O and F.


(ii) Virtual, erect.


(iii) Diminished.


(b) CB = - u


CF = - f


CB' = - v


The relation between u, v and f is given by the lens formula:



As both u and v are negative the above equation will change to




We know that the focal length of a concave lens is negative, so the above equation will be changed to,




(c) Magnification m = -1


v = +40 cm (real and inverted)


Nature of the lens = ?


Power of the lens, P = ?





According to the lens formula,





Thus, focal length = 20 cm


Because the focal length is positive, thus it is convex lens.



Since power of lens is positive, lens will be converging in nature.


Rate this question :

How useful is this solution?
We strive to provide quality solutions. Please rate us to serve you better.
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 :

<span lang="EN-USNCERT - Science Exemplar

Name the physicalLakhmir Singh & Manjit Kaur - Physics