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33. Photoelectrons are emitted from the 35. Which of the following graphs correctly
surface of zinc metal when light of show the relationship between the
intensity, I, and wavelength, λ, is energy, E, of photons of light and their
incident on it. What is the effect on the wavelength?
work function of the zinc metal if the
intensity is doubled and the wavelength
is reduced to 1 of its previous value? (A) E
4

The work function is

(A) doubled
(B) halved λ
(C) quartered
(D) unchanged (B) E

34. E.M. radiation is produced when very high
speed elections strike a hard target. This
type of electromagnetic radiation is known
as λ

(A) U.V (C) E
(B) x-rays
(C) γ -rays
(D) microwaves

λ

(D) E

λ

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02238010/SPEC 2017