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The work function of a metal is 4.2 eV ,...

The work function of a metal is `4.2 eV` , its threshold wavelength will be

A

4000 Å

B

3500 Å

C

2955 Å

D

2500 Å

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AAKASH INSTITUTE-DUAL NATURE OF RADIATION AND MATTER -ASSIGNMENT SECTION A. Objective (Only one answer)
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