Which of the following statements are correct?(A) When light rays und…

The correct answer is Option (2) → (A), (C) and (D) only

Each statement describes a common optical effect or instrument; judge each one against how that effect or instrument works.

(A) When light rays undergo two internal reflections inside a raindrop, a secondary rainbow is formed. — Correct. The primary rainbow comes from one internal reflection in the drop; the secondary rainbow comes from two internal reflections, which is why it is fainter and has its colours reversed.

(B) The angle between the emergent ray and angle of prism is called the angle of deviation. — Incorrect. The angle of deviation is the angle between the incident ray and the emergent ray; the angle of the prism plays no part in this definition.

(C) Light undergoes successive total internal reflections as it moves through an optical fibre. — Correct. Light enters the core at an angle larger than the critical angle at the core-cladding surface, so it is guided along the fibre by repeated total internal reflection.

(D) A telescope provides angular magnification of distant objects. — Correct. A distant object cannot be brought closer, so a telescope makes it subtend a larger angle at the eye; its magnifying power is an angular magnification.

(E) A simple magnifier is a diverging lens of small focal length. — Incorrect. A simple magnifier (simple microscope) is a converging lens of small focal length; a diverging lens always gives a diminished virtual image.

Note: Statements (C) and (D) of this question are from the latest textbook (2026-27), which also shows that Statement (E) is false. Statement (A), that a secondary rainbow is formed by two internal reflections inside a raindrop, is printed only in the pre-rationalised textbook (2022-23). It was removed from the latest book, and it also appears to be out of the CUET 2026 syllabus.

NCERT (2026-27):
Total Internal Reflection in Nature and Its Technological Applications – “… When a signal in the form of light is directed at one end of the fibre at a suitable angle, it undergoes repeated total internal reflections along the length of the fibre and finally comes out at the other end (Fig. 9.14).”

Telescope – “The telescope is used to provide angular magnification of distant objects (Fig. 9.25).”

The Microscope – “A simple magnifier or microscope is a converging lens of small focal length (Fig. 9.23).”

NCERT (Pre-rationalised edition, 2022-23):
The Rainbow – “… When light rays undergoes two internal reflections inside a raindrop, instead of one as in the primary rainbow, a secondary rainbow is formed as shown in Fig. 9.27(c).”