Class 12PhysicsDual Nature of Radiation and matterEinstein's Photoelectric Equation and Energy Quantum of Radiation
MediumThe threshold frequency of a metal is $f_0$. When light of frequency $2f_0$ is incident on the metal plate,the maximum velocity of the photoelectrons is $v_1$. When the frequency of the incident radiation is increased to $5f_0$,the maximum velocity of the photoelectrons emitted is $v_2$. The ratio of $v_1$ to $v_2$ is:
- A$v_1/v_2 = 1/2$
- B$v_1/v_2 = 1/8$
- C$v_1/v_2 = 1/16$
- D$v_1/v_2 = 1/4$
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When ultraviolet rays are incident on a metal plate, the photoelectric effect does not occur. It occurs by the incidence of:
In an experiment on the photoelectric effect,the frequency $\nu$ of the incident light is plotted against the stopping potential $V_0$. The work function of the photoelectric surface is given by ($e$ is the electronic charge):
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View SolutionThe work function of a substance is $4.0 \,eV$. The longest wavelength of light that can cause photoelectron emission from this substance is approximately ......... $nm$.
Explain: "For photoelectric emission, the frequency of incident radiation should be greater than the threshold frequency."
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View SolutionWhen a metallic surface is illuminated with radiation of wavelength $\lambda$,the stopping potential is $V$. If the same surface is illuminated with radiation of wavelength $2\lambda$,the stopping potential is $\frac{V}{4}$. The threshold wavelength for the metallic surface is:
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