Threshold frequency for a metal is 
. Light of 
falls on its surface. Which of the following statements is correct
A
No photoelectric emission takes place
B
Photo-electrons come out with zero speed
C
Photo-electrons come out with 
speed
speed D
Photo-electrons come out with 
speed
speed
Text Solution
Verified by ExpertsThe correct answer is:
A
Frequency of light of wavelength 
is
which is less than the given threshold frequency. Hence no photoelectric emission takes place.
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