Download App

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

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsDual Nature of Radiation and Matter1 Mark
Question
Who is responsible for the photoelectric effect experiment?
✓

Answer

  1. Heinrich Hertz
Explanation:
German physicist Heinrich Rudolf Hertz discovered the photoelectric effect in 1887 when he was working in connection with his work on radio waves. During this time, Hertz observed that, when ultraviolet light shines on two metal electrodes with a voltage applied across them, the light changes the voltage at which sparking takes place. This led to his discovery of the photoelectric effect experiment.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from Dual Nature of Radiation and Matter→Dual Nature of Radiation and Matter — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

Which of the following will produce maximum electromotive force?
→
The molecules having permanent electric dipole moment even in the absence of electric field are called as:
→
Wavenumber of radiations having frequency of $4\times 10^{14}Hz$ will be:
→
A tank is filled with benzene to a height of 120 mm. The apparent depth of a needle lying at a bottom of the tank is measured by a microscope to be 80 mm.  The refractive index of benzene is(a) 1.5 (b) 2.5(c) 3.5(d) 4.5
       
→
An electric heater is heated by de and ac respec- tively. The potential difference applied across the ends of heater for both ac and de is same. Heat gener- ated per second will be more:
→
When the intensity of light falling on a surface producing photoelectric effect is doubled, then :
→
If heat is supplied to a solid, its temperature:
  1. Must increase.
  2. May increase.
  3. May remain constant.
  4. May decrease.
→
The dimensions of magnetic flux are
→
Which of the following quantities are always negative in a simple harmonic motion?
  1. $\overrightarrow{\text{F}}.\overrightarrow{\text{a}}$
  2. $\overrightarrow{\text{v}}.\overrightarrow{\text{r}}$
  3. $\overrightarrow{\text{a}}.\overrightarrow{\text{r}}$
  4. $\overrightarrow{\text{F}}.\overrightarrow{\text{r}}$
→
The output of a 2-input OR gate is zero only when its:
→