Are lens formula, prism dispersion, YDSE, diffraction included exactly as in the current PDF?”

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Detailed Solution

Yes, all four of those topics—Lens formula, Prism dispersion, YDSE, and Diffraction—are included in the current JEE Main Physics syllabus exactly as outlined in the official NTA PDF.

The "Optics" unit was one of the areas least affected by the recent syllabus rationalization, and these fundamental topics remain a crucial and high-weightage part of it.

Ray Optics

The syllabus under this section explicitly covers:

Refraction at spherical surfaces, lenses, thin lens formula, and the lens-maker's formula.
Refraction and dispersion of light through a prism.

The scope for these topics remains completely unchanged.

Wave Optics

This section is built around the core concepts of interference and diffraction. The syllabus includes:

Interference, Young's double-slit experiment (YDSE), and the expression for fringe width.
Diffraction due to a single slit and the width of the central maximum.

You should prepare these topics thoroughly. They form the backbone of the Optics unit, and questions from them are frequently and consistently asked in the JEE Main exam.

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