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Class 12 Physics — Chapter 9: Ray Optics and Optical Instruments
90 practice questions · 30 Easy · 30 Medium · 30 Hard
Free NCERT-aligned multiple-choice practice for Class 12 Physics, Chapter 9 (Ray Optics and Optical Instruments). Practise timed Easy, Medium and Hard quizzes with instant explanations — built for CBSE Board exams, JEE Main and NEET UG. Here are a few sample questions; sign in free to practise all 90.
Sample questions
Q1Easy
Power of a lens unit:
A.Dioptre (1/m)✓ correct
B.Watt
C.Tesla
D.Newton
Why
P = 1/f (in metres).
Q2Medium
Lens formula:
A.1/v − 1/u = 1/f✓ correct
B.1/v + 1/u = 1/f
C.u + v = f
D.u·v = f²
Why
Sign convention applies.
Q3Hard
Compound microscope uses:
A.Two convex lenses (objective + eyepiece)✓ correct
B.Concave + convex
C.Two concave
D.One mirror
Why
Both magnify; total M = M_o × M_e.
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