Question

The threshold frequency of a metal 7.00*1014sec-1 . calculate the kinetic energy of an electron ..

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Answer 1

Chemistry

Structure of Atom

Development Leading to Bohr's Model of Atom

The threshold frequency v0 ...

CHEMISTRY

The threshold frequency v0 for a metal is 7.0×1014s−1. Calculate the kinetic energy of an electron emitted when radiation

ANSWER

Given that, 

vo=7.0×1014s−1

v=1.0×1015s−1

As we know, hv=hv0+21mv2

i.e.  h(v−v0)=K.E.

∴K.E.=(6.626×10−34)×(1.0×1015−7.0×1014)=6.626×10−34×1014(10−7)

∴K.E=19.878×

Answer 2

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