2021 source guide · Physics

NEET 2021 Physics Ray Optics Questions

Use this page to connect the official 2021 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.

Practice 134 verified questions →Check official NTA archive ↗

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 1 · difficulty 1/5

Which pair of conditions is necessary for total internal reflection at an interface?

A. Light travels from rarer to denser medium, and incidence exceeds 90°
B. Light travels from denser to rarer medium, and incidence is below the critical angle
C. Light travels from rarer to denser medium, and incidence equals the critical angle
D. Light travels from denser to rarer medium, and incidence exceeds the critical angle

Example 2 · difficulty 1/5

Which physical process primarily keeps light confined within the transparent core of an optical fibre as it travels along bends?

A. Repeated total internal reflection at the core-cladding boundary
B. Repeated refraction into the cladding
C. Diffraction at regularly spaced openings
D. Polarisation by reflection from metallic walls

Example 3 · difficulty 3/5

A ray enters normally through one short face of a right-angled isosceles glass prism. Its incidence angle at the hypotenuse is 45°, while the glass-air critical angle is 42°. What happens at the hypotenuse?

A. It emerges normally without deviation
B. It undergoes total internal reflection
C. It refracts along the hypotenuse
D. It is completely absorbed

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

Ray Optics and Optical Instruments →

Frequently asked questions

Are these official NEET 2021 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 2021 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.