Threshold frequency for a metal is 5 - 1014 S-1- Calculate the K-E of excited electron when radiation of frequency v- 3 - 1015s-1-

The correct option is B 16.5625 × 10^ 19J work function = hv_0 #160; #160; #160; #160; #160; #160; #160; #160; #160; #160; #16 ...

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Standard XII

Chemistry

Reasons of Stability

Threshold fre...

Question

Threshold frequency for a metal is $5 \times 10^{14} S^{- 1}$ . Calculate the K.E of excited electron when radiation of frequency $v = 3 \times 10^{15} s^{- 1}$ .

16.5625 \times 10^{- 19} J

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165.625 \times 10^{19} J

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16.5625 \times 10^{19} J

No worries! We‘ve got your back. Try BYJU‘S free classes today!

165.625 \times 10^{- 19} J

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Solution

The correct option is B $16.5625 \times 10^{- 19} J$
$w o r k f u n c t i o n = h v_{0}$
$= (6.626 \times 10^{- 34} \times 5 \times 10^{14}) J o u l e$
$= 3.325 \times 10^{- 19} J$
$E n e r g y o f r a d i a t i o n = 1.9875 \times 10^{- 18} J$
$K . E = 16.55 \times 10^{- 19} J$

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Threshold frequency for a metal is 5×1014S−1. Calculate the K.E of excited electron when radiation of frequency v=3×1015s−1.

The correct option is B 16.5625×10−19Jworkfunction=hv0 =(6.626×10−34×5×1014)Joule =3.325×10−19JEnergyofradiation=1.9875×10−18JK.E=16.55×10−19J

Threshold frequency for a metal is $5 \times 10^{14} S^{- 1}$ . Calculate the K.E of excited electron when radiation of frequency $v = 3 \times 10^{15} s^{- 1}$ .

The correct option is B $16.5625 \times 10^{- 19} J$
$w o r k f u n c t i o n = h v_{0}$
$= (6.626 \times 10^{- 34} \times 5 \times 10^{14}) J o u l e$
$= 3.325 \times 10^{- 19} J$
$E n e r g y o f r a d i a t i o n = 1.9875 \times 10^{- 18} J$
$K . E = 16.55 \times 10^{- 19} J$