A metal surface ejects electrons when hit by green light but nothing when hit by yellow light. The electrons will be ejected when the surface is hit by
According to Einstein’s photoelectric equation, the graph of kinetic energy of the photoelectron emitted from the metal versus the frequency of the incident radiation gives a straight line graph, whose slope
1.depends on the intensity of the incident radi-ation.
2.depends on the nature of the metal and also on the intensity of incident radiation.
3.is same for all metals and independent of the intensity of the incident radiation.
4.depends on the nature of the metal.
1.depends both on intensity and frequency of the incident light.
2.does not depend on the frequency of incident light but depends on the intensity of the inci-dent light.
3.decreases with increase in frequency of inci-dent light.
4.increases with increase in frequency of inci-dent light.
Cathode rays were discovered by
1.Maxwell Clerk James
In Geiger-Marsden scattering experiment, the trajectory traced by an a-particle depends on
1.number of collision
2.number of scattered a-particles
4.none of these
1.frequency of incident light
2.nature of the emitter material
3. intensity of incident light
4.both (1) and (2)
1.intensity of incident light
2.potential difference applied between the two electrodes
3.the nature of emitter material
4.frequency of incident light
In the Geiger-Marsden scattering experiment, is case of head-on collision the impact parameter should be
3. J.J. Thomson
1. base current
2. saturation current
4. emitter current
The minimum energy required for the electron emission from the metal surface can be supplied to the free electrons by which of the following physical processes?
4.All of these
Which of the following spectral series falls within the visible range of electromagnetic radiation?
1.The photocurrent increases with intensity of light.
2.Stopping potential increases with increase in intensity of incident light.
3. The photocurrent increases with increase in frequency.
4.All of these
1. Electron momentum