AP EAMCET Engineering 2018 Apr 23 Shift 2 Paper

The total energy can be calculated as:
Total energy =ω0+KE
=4.80+0.220
=5.0‌eV
Since we know that 1 eV is equal to 1.6021×10−19
Therefore, 5 eV will be equal to
5×1.6021×10−19J=8.010×10−19J
The frequency is calculated as:
Frequency (v)=

Total‌Energy

h(Plancks‌constant)

h Plancks constant Frequency (v)=

8.010×10−19

6.626×10−34

=1.21×1015‌Hz