i. V =?f0
f0 =(3.0 x 10^8)/(8.0 x 10^-7)
= 3.75 x 10^14 Hz
ii. Work function = hf0
=6.63 x 10^-34 x 3.75 x10^14
=2.49 x 10^-19 J
In electron volt = (2.49 x 10^-19)/( 1.6 x 10^-19)
= 1.55eV
iii. K.E. MAX = hf – hf0
= 6.63 x 10^-34(8.5 – 3.75)
=3.149 x 10^-19 joules.
joseph rimiru answered the question on December 10, 2017 at 18:10
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