MEDIUMALLEN NEET Coaching
ApplyAce your NEET preparation with ALLEN Online Programs
Search Colleges, Exams, Schools & more
Magnification In Lenses - Practice Questions & MCQ
Edited By admin | Updated on Sep 25, 2023 25:23 PM | #NEET
Quick Facts
-
Magnification in Lenses is considered one of the most asked concept.
-
9 Questions around this concept.
Solve by difficulty
A telescope has an objective lens of focal length 150 cm and an eyepiece of focal length 5 cm. If a 50 m tall tower at a distance of 1 km is observed through this telescope in a normal setting, the angle formed by the image of the tower is , then
close to :
The magnifying power of a telescope is 9. When it is adjusted for parallel rays the distance between the objective and eyepiece is 20 cm. The focal length of lenses are:
A screen beaming a real image of magnification m1 formed by a convex lens is moved a distance . The object is the moved until a new image of magnification
is formed on the screen. The focal length of the lens is
An object is placed at a distance of to the left on the axis of a convex lens A of focal length
. A second convex lens of focal length
is placed co-axially to the right of the lens A at a distance of
from A. Find the position of the final image and its magnification. Trace the path of the rays.
Find the size of the image formed in the situation shown in figure.
Concepts Covered - 1
Magnification in Lenses
Magnification in Lenses-
Magnification produced by a lens is defined as the ratio of size of the image to that of the object.
For the derivation let an object is palced whose height is h and the image height is h'. Let us consider an object is placed on the principal axis with its height h perpendicular to the principal axis as shown in figure. The first ray is passing through the optic centre will go undeviated. The second ray parallel to the principal axis must pass through the focus F' The image is formed where both the light rays intersect. By this we get an image of height h'. So mathematically, magnification can be written as -
Like mirror we can derive the formula of magnification in terms of the position of object and image. For this, consider the figure given below -
As the triangle OO'P and II'P, is similar so we can write that -
So,
Study it with Videos
Magnification in Lenses"Stay in the loop. Receive exam news, study resources, and expert advice!"
Get Answer to all your questions
NEET Articles
May 07, 2024
Begin a career in Medical and Allied Sciences. Admissions Open for
Amrita Vishwa Vidyapeetham Allied & Life Science 2024
ApplyAdmissions Open for multiple allied and health sciences programs across 5 campuses | Ranked #7 in India by NIRF, NAAC A++ Accredited
PACE IIT & Medical, Financial District, Hyd
ApplyEnrol in PACE IIT & Medical, Financial District, Hyd for JEE/NEET preparation
Resonance Coaching
ApplyEnroll in Resonance Coaching for success in JEE/NEET exams
NEET previous year papers with solutions
ApplySolve NEET previous years question papers & check your preparedness
NEET College Predictor
ApplyKnow possible Govt/Private MBBS/BDS Colleges based on your NEET rank
News and Notifications
2 days ago :
2 days ago :
3 days ago :
May 02, 2024 - 08:54 PM IST
May 02, 2024 - 05:46 PM IST
May 01, 2024 - 06:34 PM IST
May 01, 2024 - 06:17 PM IST
April 30, 2024 - 09:30 PM IST
April 30, 2024 - 07:30 PM IST
April 30, 2024 - 06:26 PM IST
Download Careers360 App's
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile
300M+
Students
36,000+
Colleges
550+
Exams
1500+
E-Books
16000+
Certifications
We Appeared in
Back to top