Advertisements
Advertisements
प्रश्न
Plot a graph showing the variation of photoelectric current, as a function of anode potential for two light beams having the same frequency but different intensities I1 and I2 (I1 > I2). Mention its important features.
Advertisements
उत्तर
We use radiations with varying frequencies but the same intensity. When the frequency increases, the photoelectric current increases, and when the frequency decreases, the photoelectric current decreases. However, beyond a particular anode potential, the photoelectric current remains constant for all radiations of different frequencies. This is referred to as saturation current. As a result, the saturation current is unaffected by radiation frequency.
APPEARS IN
संबंधित प्रश्न
The work function for the following metals is given:
Na: 2.75 eV; K: 2.30 eV; Mo: 4.17 eV; Ni: 5.15 eV
Which of these metals will not give photoelectric emission for a radiation of wavelength 3300 Å from a He-Cd laser placed 1 m away from the photocell? What happens if the laser is brought nearer and placed 50 cm away?
Can we find the mass of a photon by the definition p = mv?
What is the speed of a photon with respect to another photon if (a) the two photons are going in the same direction and (b) they are going in opposite directions?
Let nr and nb be the number of photons emitted by a red bulb and a blue bulb, respectively, of equal power in a given time.
When stopping potential is applied in an experiment on photoelectric effect, no photoelectric is observed. This means that
A point source of light is used in a photoelectric effect. If the source is removed farther from the emitting metal, the stopping potential
A photon of energy hv is absorbed by a free electron of a metal with work-function hv − φ.
In photoelectric effect, the photoelectric current started to flow. This means that the frequency of incident radiations is ______.
Why it is the frequency and not the intensity of the light source that determines whether the emission of photoelectrons will occur or not? Explain.
Which of the following options represents the variation of photoelectric current with property of light shown on the x-axis?
