PYQSide ExamsMy practice

Dual Nature of Radiation and Matter · Question 78

AIPMT 2001MCQEasy📈 Topic in 75% papers+4−1
1

Which one among the following shows particle nature of light?

  1. photoelectric effect
  2. interference
  3. refraction
  4. polarization

Answer

(1) photoelectric effect

Solution

Interference and polarization are explained only by the wave nature of light, and refraction is also explained by the wave theory.

In the photoelectric effect, light behaves as a stream of photons, each of energy E = h ; one photon is absorbed by one electron, so the emission is instantaneous and the maximum kinetic energy depends on frequency, not on intensity.

∴ The photoelectric effect shows the particle nature of light.

Answer: (1)

AIPMT 2001

Keep practising — Dual Nature of Radiation and Matter

2

A photo-cell is illuminated by a source of light, which is placed at a distance d from the cell. If the distance becomes d/2, then number of electrons emitted per second, will be

  1. remain same
  2. four times
  3. two times
  4. one-fourth
AIPMT 2001
3

The interplanar distance in a crystal is 2.8 10-8 m. The value of maximum wavelength which can be diffracted is

  1. 2.8 10-8 m
  2. 5.6 10-8 m
  3. 1.4 10-8 m
  4. 7.6 10-8 m
AIPMT 2001
4

By photoelectric effect, Einstein proved

  1. E = h
  2. K.E. = 12 mv2
  3. E = mc2
  4. E = -Rhcn2
AIPMT 2000
5

Who evaluated the mass of electron indirectly with help of charge

  1. Thomson
  2. Millikan
  3. Rutherford
  4. Newton
AIPMT 2000

All Dual Nature of Radiation and Matter PYQs →

PDFDownload Dual Nature of Radiation and Matter 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)