Keywords:#concave lens light ray parallel to principal axis#NEET 2026 Code 12 Q19#Ray Optics and Optical Instruments NEET 2026#Concave Lens Refraction NEET 2026
More Ray Optics and Optical Instruments Previous-Year Questions
Q23neet_2024_05_may_morningPrism Refraction and Angle of Deviation
A ray of monochromatic light is passing through an equilateral prism (ABC) as shown in the figure. The refracted ray (QR) is parallel to its base (BC) and the angle of incidence (i) is 50°$50^{\circ}$ . Then the angle of deviation ( δ$\delta$ ) is:
Equilateral prism showing light ray incident at angle i and emerging at angle e with internal ray parallel to base.
A.40°$40^{\circ}$
B.45°$45^{\circ}$
C.55°$55^{\circ}$
D.35°$35^{\circ}$
Solution
Related Formula
i + e = A + δ$$i + e = A + \delta$$
Core Logic
Since ray QR is parallel to base BC, i = e = 50°$i = e = 50^{\circ}$.
Equilateral prism showing light ray incident at angle i and emerging at angle e with internal ray parallel to base.
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