Magnification
Tested in 2 real MPSC questions across 1 year (2018–2018). See it in context on the interactive Concept Graph →
Years it was asked
What you need to know first
Sign conventions in opticsRadius of curvature and focal length relation
Real questions that test this
1 मिमी × 1 मिमी च्या चौरसाची नक्षी असलेले कार्ड शीट, डोळ्यांच्या अगदी जवळ असलेल्या 9 सेमी नाभीय अंतराच्या बहिर्वर्क भिंगातून 9 सेमी अंतरावरून बघितल्यास, त्या कार्ड शीट वरील चौरस ________ आकाराचे दिसतील. A card sheet divided into squares, each of size 1 mm × 1 mm is being viewed at a distance of 9 cm through a convex lens of focal length 9 cm held close to the eye. The squares on the card sheet will be observed to be of size
a)10 मिमी × 10 मिमी✓ Correct
b)10 मिमी2
c)10 सेमी2
d)1 मिमी2
When object distance equals focal length of a convex lens, the image is formed at infinity, making the calculation straightforward based on magnification formulas.