PYQSide ExamsMy practice

Ray Optics and Optical Instruments · Question 71

AIPMT 2002MCQMedium📈 Topic in 25% papers+4−1
1

For the given incident ray as shown in the figure, for total internal reflection of this ray, the required refractive index of the prism will be [figure]

  1. 3+12
  2. 2+12
  3. 32
  4. 76

Answer

(3) 32

Solution

At the top face, i = 45 :

45 = r

⇒ r = 1 2

The faces are perpendicular, so the angle of incidence on the side face is (90 - r).

For total internal reflection: (90 - r) 1

⇒ r 1

⇒ 1 - 12 2 1 2

⇒ 2 32

∴ = 32 (minimum required value)

Answer: (3)

AIPMT 2002

Keep practising — Ray Optics and Optical Instruments

2

Optical fibres are based on

  1. total internal reflection
  2. less scattering
  3. refraction
  4. less absorption coefficient
AIPMT 2001
3

A ray of light travelling in air has wavelength , frequency n, velocity v and intensity I. If this ray enters into water then these parameters are ', n', v' and I' respectively. Which relation is correct from following?

  1. = '
  2. n = n'
  3. v = v'
  4. I = I'
AIPMT 2001
4

A disc is placed on a surface of pond which has refractive index 5/3. A source of light is placed 4 m below the surface of liquid. The minimum radius of disc needed so that light is not coming out is

  2. 3 m
  3. 6 m
  4. 4 m
AIPMT 2001
5

A bubble in glass slab ( = 1.5) when viewed from one side appears at 5 cm and 2 cm from other side, then thickness of slab is

  1. 3.75 cm
  2. 3 cm
  3. 10.5 cm
  4. 2.5 cm.
AIPMT 2000
6

A tall man of height 6 feet, wants to see his full image. Then required minimum length of the mirror will be

  1. 12 feet
  2. 3 feet
  3. 6 feet
  4. any length
AIPMT 2000
7

A plano-convex lens ( = 1.5) has radius of curvature 10 cm. It is silvered on its plane surface. Find focal length after silvering

  1. 10 cm
  2. 20 cm
  3. 15 cm
  4. 25 cm
AIPMT 2000
8

Rainbow is formed due to

  1. scattering and refraction
  2. internal reflection and dispersion
  3. reflection only
  4. diffraction and dispersion.
AIPMT 2000

All Ray Optics and Optical Instruments PYQs →

PDFDownload Ray Optics and Optical Instruments PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All NEET Physics chapters
Class 11Units and MeasurementsMotion in a Straight LineMotion in a PlaneLaws of MotionWork, Energy and PowerSystem of Particles and Rotational MotionGravitationMechanical Properties of SolidsMechanical Properties of FluidsThermal Properties of MatterThermodynamics (Physics)Kinetic TheoryOscillationsWaves
Class 12Electric Charges and FieldsElectrostatic Potential and CapacitanceCurrent ElectricityMoving Charges and MagnetismMagnetism and MatterElectromagnetic InductionAlternating CurrentElectromagnetic WavesRay Optics and Optical InstrumentsWave OpticsDual Nature of Radiation and MatterAtomsNucleiSemiconductor ElectronicsExperimental Skills (Physics)