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JEE Advanced Ray Optics — practice questions

Explore 27 free Ray Optics questions in JEE Advanced Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Ray Optics questions and exercises with answers

Showing questions 1–27 of 27.

Snell's law of refraction states:Read the answer and worked solution →For a plane mirror, image is:Read the answer and worked solution →Focal length of a concave mirror with radius of curvature R:Read the answer and worked solution →Mirror formula relating object distance u, image distance v, focal length f:Read the answer and worked solution →Magnification by a mirror:Read the answer and worked solution →Refractive index of water is 1.33. Critical angle for water-air interface:Read the answer and worked solution →For a thin lens, lens-maker's formula:Read the answer and worked solution →For a convex lens, an object at 2f forms image at:Read the answer and worked solution →Power of a lens (P) is defined as:Read the answer and worked solution →Two thin lenses of powers P₁ and P₂ in contact give combined power:Read the answer and worked solution →Refraction by a prism: deviation δ depends on:Read the answer and worked solution →In a compound microscope, magnification by objective is m_o, eyepiece is m_e. Total magnification:Read the answer and worked solution →Telescope's angular magnification (normal adjustment, image at infinity):Read the answer and worked solution →Speed of light in a medium of refractive index n:Read the answer and worked solution →Object at focus of a convex lens. Image is:Read the answer and worked solution →An object 4 cm tall is placed 30 cm in front of a concave mirror of focal length 20 cm. Image position and size:Read the answer and worked solution →For an apparent depth of swimming pool seen from above (real depth d, water n = 4/3):Read the answer and worked solution →Critical angle for diamond (n = 2.42):Read the answer and worked solution →Combination of two lenses, f₁ = 20 cm convex and f₂ = -25 cm concave, in contact. Equivalent power:Read the answer and worked solution →Dispersion of light by prism: angular dispersion (δ_violet - δ_red) for thin prism:Read the answer and worked solution →A coin at the bottom of a 0.5 m water tank (n = 4/3) appears at depth:Read the answer and worked solution →In Young's double slit experiment, fringe width:Read the answer and worked solution →Refractive index of medium 1 w.r.t. medium 2 is n₁₂. Then:Read the answer and worked solution →Magnifying power of simple magnifier (image at near point):Read the answer and worked solution →For object at 60 cm from convex lens of f = 20 cm, image is:Read the answer and worked solution →For total internal reflection at glass-water interface (n_g = 1.5, n_w = 1.33), critical angle:Read the answer and worked solution →A ray enters a glass slab at 45°. Glass n = 1.5. Angle of refraction inside glass:Read the answer and worked solution →

Worked practice questions

Snell's law of refraction states:

  1. n₁/sin θ = n₂
  2. n₁ sin θ₁ = n₂ sin θ₂
  3. sin θ₁ = sin θ₂
  4. n₁ cos θ₁ = n₂ cos θ₂
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Correct answer: B. n₁ sin θ₁ = n₂ sin θ₂

**Snell's law:** n₁ sin θ₁ = n₂ sin θ₂, where θ₁, θ₂ are angles measured from normal. n = c/v (refractive index). When light enters denser medium, it bends toward normal.

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For a plane mirror, image is:

  1. Virtual, inverted
  2. Real, magnified
  3. Real, inverted
  4. Virtual, erect, same size, behind mirror
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Correct answer: D. Virtual, erect, same size, behind mirror

Plane mirror produces virtual (cannot be projected on screen), erect, same-size image as far behind the mirror as object is in front. Lateral inversion (left ↔ right).

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Focal length of a concave mirror with radius of curvature R:

  1. -R
  2. 2R
  3. R/2
  4. R
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Correct answer: C. R/2

f = R/2 for spherical mirrors (paraxial approximation). For concave (converging) mirror, f > 0 by convention for convex (diverging), f < 0.

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