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NEET UG Ray Optics: related Physics practice

The practice bank below covers broader Physics topics; a dedicated Ray Optics lesson is not available yet.

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Physics questions and exercises with answers

Showing questions 1–17 of 17.

The linear magnification produced by a spherical mirror is given by:Read the answer and worked solution →A convex (diverging) mirror always forms an image that is:Read the answer and worked solution →If n₂₁ is the refractive index of medium 2 w.r.t. medium 1, then n₁₂ equals:Read the answer and worked solution →When light passes through a rectangular glass slab, the emergent ray is:Read the answer and worked solution →For light going from a medium of refractive index n to air, the critical angle i_c is given by:Read the answer and worked solution →The critical angle for diamond (n ≈ 2.42) and water (n ≈ 1.33) is approximately:Read the answer and worked solution →The lens-maker's formula for a thin lens (refractive index n) with radii of curvature R₁ and R₂ is:Read the answer and worked solution →The magnification produced by a thin lens is:Read the answer and worked solution →The power P of a lens with focal length f (in metres) is:Read the answer and worked solution →Which colour of light deviates LEAST when white light passes through a glass prism?Read the answer and worked solution →The speed of light in vacuum is approximately:Read the answer and worked solution →For a concave lens (diverging lens), the image of a real object is always:Read the answer and worked solution →Pick the higher optical valueRead the answer and worked solution →Sort microscope from telescopeRead the answer and worked solution →Key in the ray optics answersRead the answer and worked solution →Complete the lens power ruleRead the answer and worked solution →Sort reflection from refractionRead the answer and worked solution →

Worked practice questions

The linear magnification produced by a spherical mirror is given by:

  1. m = u/v
  2. m = −v/u (with sign convention)
  3. m = v × u
  4. m = f/u
Show answer and solution

Correct answer: B. m = −v/u (with sign convention)

**Magnification m = h'/h = −v/u**. **Sign of m tells about image orientation:** **negative m → inverted image (real) positive m → erect image (virtual)**.

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A convex (diverging) mirror always forms an image that is:

  1. Real, inverted, magnified
  2. Virtual, erect, diminished, between pole and focus
  3. Real, inverted, diminished
  4. Virtual, inverted, magnified
Show answer and solution

Correct answer: B. Virtual, erect, diminished, between pole and focus

**Convex mirror always produces virtual, erect, diminished image** for a real object (regardless of object distance). Used for car side mirrors (wide field of view) and security mirrors. The image forms between pole and focus (behind mirror).

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If n₂₁ is the refractive index of medium 2 w.r.t. medium 1, then n₁₂ equals:

  1. n₂₁
  2. 1 / n₂₁
  3. n₂₁²
  4. 1 − n₂₁
Show answer and solution

Correct answer: B. 1 / n₂₁

**n₁₂ = 1 / n₂₁** (reversibility of light). Also, for three media: **n₃₁ = n₃₂ × n₂₁** (or equivalently n₃₂ = n₃₁ × n₁₂).

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More Physics topics

Electric Charges and FieldsMoving Charges and MagnetismRay Optics and Optical InstrumentsSemiconductor ElectronicsCurrent ElectricityDual Nature of Radiation and MatterKinetic Theory & OscillationsSystem of Particles and Rotational Motion