Example 1 · difficulty 2/5
A thin symmetric biconvex glass lens in air has refractive index 1.5. The magnitudes of the radii of its two surfaces are both 20 cm. What is its focal length?
- A. 20 cm
- B. 10 cm
- C. 40 cm
- D. 80 cm
2026 source guide · Physics
NEET 2026 Physics Ray Optics Questions
Use this page to connect the official 2026 paper with current Physics practice. NeetVellum does not claim a chapter appeared in that paper until the official question and final key have been mapped.
What to master
mirrors, lenses, refraction, optical instruments and sign-convention discipline.
Original practice preview
These are current-syllabus NeetVellum questions, shown separately from historical-paper provenance.
Example 2 · difficulty 4/5
A glass lens of refractive index 1.5 has focal length 20 cm in air. It is completely immersed in a liquid of refractive index 1.25. Assuming the lens remains thin, what is its new focal length?
- A. 25 cm
- B. 50 cm
- C. 80 cm
- D. 100 cm
Example 3 · difficulty 2/5
A symmetric biconvex lens made of glass of refractive index 1.5 has focal length 30 cm in air. What is the magnitude of the radius of curvature of either surface?
- A. 15 cm
- B. 20 cm
- C. 30 cm
- D. 60 cm
The evidence-first practice loop
- 1. Verify provenanceOfficial paper and final key before accepting a PYQ label.
- 2. Attempt closed-bookExpose the concept or execution gap before rereading.
- 3. Repair and returnClassify the miss and re-practice after a delay.
Canonical chapter practice
Frequently asked questions
Are these official NEET 2026 Physics Ray Optics PYQs?
No. The previews are original NeetVellum practice questions. A historical item receives a PYQ label only after its official paper and authoritative final answer key are attached. Use the official archive for the source paper.
How should I use the NEET 2026 paper?
Solve the official paper under its original timing, verify against the final key, classify every miss, and then use the linked current-syllabus practice bank to repair the exposed concept.