Photoelectric effect proves that light i...

Photoelectric effect proves that light is—

A. a wave

B. a particle

C. both particle and wave

D.NONE

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Light of wavelength 488 nm is produced by an argon laser which is used in the photoelectric effect. When light from this spectral line is incident on the cathode, the stopping (cut-off) potential of photo electrons is 0.38 V. Find the work function of the material from which the cathode is made.

Ratio of the work functions of two metal surface is 1 : 2 . If threshold wavelength of photoelectric effect for the 1st metal is 6000Å , what is the corresponding value for the 2nd metal surface?

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The alkali metal for which photoelectric effect is maximum is -

A certain, metallic surface is illuminated with monochromatic light of wavelength, lamda . The stopping potential for photoelectric current for this light is 3 V_(0) . If the same surface is illuminated with light of wavelength 2lamda , the stopping potential is V_(0) . The threshold wavelength for this surface for photoelectric effect is

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The work function (phi) of some metal is listed below. The number of metals which will show photoelectric effect when light of 300 nm wavelength falls on the metal is :

The threshold frequency of photoelectric effect of a metal surface is f_(0) . The stopping potentials are V_(0) and nV_(0) when the frequencies of incident light are 2f_(0) and 4f_(0) . What is the value of n ?

UNITED BOOK HOUSE-MODEL PAPER SET-09-EXERCISE

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