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Dual Nature of Radiation and Matter — Physics STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 SciencePhysicsDual Nature of Radiation and Matter2 Marks
Question
  1. Write two main observations of photoelectric effect experiment which could only be explained by Einstein’s photoelectric equation.
  2. Draw a graph showing variation of photocurrent with the anode potential of a photocell.
✓

Answer

  1.  
  1. There exists a threshold frequency below which no photoelectron is ejected.
  2. KE of electron depends linearly on frequency and is independent of intensity of radiation.
  1.  

[only curve is essential to draw]

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