5.56 x 1019Hz
1.66 x 1019Hz
1.12 x 1015Hz
8.42 x 1014Hz
Correct answer is C
F = K.E+Woh
= 3.0×1.6×10−19+2.56×106−196.6×106−34
- 1.12 x 10-15HZ
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