Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
JEE Main 202528 JanuaryMorning Shift
Exam
JEE Main
Year
2025
Date
28 January
Shift
Morning Shift
Subject
Physics
Chapter
Ray Optics

JEE Main 2025 · 28 January · Morning Shift · Physics · Ray Optics

A thin prism P_1 with angle 4^ made of glass having refractive...

A thin prism P1\mathrm{P}_1 with angle 4∘4^{\circ} made of glass having refractive index 1.54 , is combined with another thin prism P2\mathrm{P}_2 made of glass having refractive index 1.72 to get dispersion without deviation. The angle of the prism P2P_2 in degrees is

Options

  1. A3
  2. B16/3
  3. C4
  4. D1.5

Correct answer

A. 3

Step-by-step solution

For dispersion without deviation, (μ1−1)A1=(μ2−1)A2⇒(1.54−1)4∘=(1.72−1)A2 Or  A2=0.540.72×4=3∘\begin{aligned} & \left(\mu_1-1\right) A_1=\left(\mu_2-1\right) A_2 \\ & \Rightarrow \quad(1.54-1) 4^{\circ}=(1.72-1) A_2 \\ & \text{\text{ Or } } A_2=\frac{0.54}{0.72} \times 4=3^{\circ} \end{aligned}
Practice Ray Optics on Quantrex Academy →

More from Ray Optics

A double convex lens made of glass of refractive index 1.5 and radii of curvature of the… JEE Advanced 2026A beam of polychromatic light passes through a thin prism of prism angle 6^∘ . The… JEE Advanced 2026Consider two isosceles prisms 1 and 2 with prism angles A_1 and A_2 and refractive… JEE Advanced 2026A thin biconvex lens is prepared from the glass ( μ=1.5 ) both curved surfaces of which… JEE Main 2026Light ray incident along a vector AO ( AO = 2 i -3 j ) emerges out along vector OB ( OB =… JEE Main 2026Angle of minimum deviation is equal to the half of the angle of prism in an equilateral… JEE Main 2026A concave mirror of focal length 10 cm forms an image which is double the size of object… JEE Main 2026A spherical interface lens of radius R separates two media of refractive indices 1 and… JEE Main 2026 Full Ray Optics list All JEE Main PYQs