NCERT/Class 10/Science/Light – Reflection and Refraction

Light – Reflection and Refraction

Class 10 · Science

150 questions50 easy50 medium50 hard

Sample Questions

Q1.At what distance from a convex lens of focal length 20 cm should an object be placed to get an image twice the size of the object? (Consider both real and virtual cases)

  • A30 cm (for real image, m=-2) or 10 cm (for virtual image, m=+2)
  • B40 cm only
  • C20 cm only
  • D10 cm only

Q2.What is the magnification of a convex mirror if the object is at 30 cm and the image at 10 cm behind it?

  • A+1/3 (erect, diminished)
  • B-1/3
  • C+3
  • D-3

Q3.An object is placed 15 cm from a concave lens of focal length 10 cm. What is the magnification and nature of image?

  • Am = +0.4; virtual, erect, diminished
  • Bm = -0.4; real, inverted
  • Cm = +2; virtual, magnified
  • Dm = -1; same size

Q4.Why does a swimming pool appear shallower than its actual depth?

  • ALight from the pool bottom refracts at the water-air surface, bending away from normal. The refracted rays appear to come from a shallower point (apparent depth < real depth)
  • BThe water compresses the pool
  • COur eyes are defective in water
  • DThe pool walls reflect light strangely

Q5.A convex lens of focal length 15 cm is combined with a concave lens. The combination has a power of +2 D. What is the focal length of the concave lens?

  • A-150/7 cm ≈ -21.4 cm
  • B-50 cm
  • C-30 cm
  • D-15 cm

Q6.This is a sample question to preview what you'll get in the full practice test...

  • A. Option one
  • B. Option two
  • C. Option three
  • D. Option four
Create a test to practice all 150 questions →

Concepts Covered

AlgebraicAlgebraic DerivationAngle of DeviationApertureApparent DepthApplicationsAtmospheric RefractionCentre of CurvatureCombinationComplete SolutionConcave LensConcave MirrorConvex LensConvex MirrorCritical AngleDenser MediumDiamondDioptreDispersionEffective Focal LengthEnergyFocal LengthFocal PointGlassGlass SlabHypermetropia CorrectionIdentificationImage FormationImage InterpretationImage MovementImage PropertiesImage RangeImage at CImage at FImage at InfinityLateral DisplacementLaws of ReflectionLensLens CombinationLens FormulaLens PropertiesLightMagnificationMagnifying GlassMirrorMirror ComparisonMirror FormulaMirror TerminologyMulti-stepMulti-step NumericalMultiple ImagesMyopia CorrectionNormalNormal IncidenceNumericalOptical CentreOptical DensityOpticsPlane MirrorPlane MirrorsPolePowerPower of LensPrincipal AxisPrismProofRadius of CurvatureRainbowRarer MediumRay DiagramReal ImageReal-world ProblemReciprocalReflectionRefractionRefractive IndexRelativeSame Size ImageSign ConventionSnell's LawSolar ApplicationsSpeed of LightSpherical MirrorsSunTotal Internal ReflectionTwo SolutionsTypes of LensesVerificationVirtual ImageWaterWave Nature

Ready to practice?

Create a timed test from 150 questions in Light – Reflection and Refraction. Pick your difficulty, get instant scores.

Start Practice Test