PYQSidePowered byPrepblink ExamsMy practice

Wave Optics

JEE Main 2025 (Online) 22nd January Morning ShiftMCQEasy📈 Topic in 50% papers+4−1
Ques. 1JEE Main 2025, 22 January (Morning Shift)

Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the most appropriate answer from the options given below :

  1. (A) is false but (R) is true
  2. Both (A) and (R) are true but (R) is not the correct explanation of (A)
  3. Both (A) and (R) are true and (R) is the correct explanation of (A)
  4. (A) is true but (R) is false

Answer

(3) Both (A) and (R) are true and (R) is the correct explanation of (A)

Solution

In a medium the frequency is fixed, v= c and m= (R) true.

= Dd m= air < air (A) true.

The smaller wavelength (from the reduced speed) gives the smaller fringe width, so (R) explains (A).

Answer: (3)

Keep practising — Wave Optics

Ques. 2JEE Main 2025, 22 January (Evening Shift)

A transparent film of refractive index, 2.0 is coated on a glass slab of refractive index, 1.45. What is the minimum thickness of transparent film to be coated for the maximum transmission of Green light of wavelength 550 nm . [Assume that the light is incident nearly perpendicular to the glass surface.]

  1. 68.7 nm
  2. 137.5 nm
  3. 94.8 nm
  4. 275 nm
Ques. 3JEE Main 2025, 22 January (Evening Shift)

Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). In the light of the above statements, choose the correct answer from the options given below :

  1. (A) is true but (R) is false
  2. Both (A) and (R) are true and (R) is the correct explanation of (A)
  3. (A) is false but (R) is true
  4. Both (A) and (R) are true but (R) is NOT the correct explanation of (A)

All Wave Optics PYQs →

PDFDownload Wave Optics PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All JEE Main 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)