0.8 x \(10^{-7}\)m
1 x \(10^{-7}\)m
2.3 x \(10^{-7}\)m
3.8 x \(10^{-7}\)m
12.4 x \(10^{-7}\)m
Correct answer is C
\(\theta = E - E_f = h_f = \frac{v}{\lambda} \Rightarrow = \lambda = \frac{h_v}{\theta}
\frac{6.6\times 10^{-34} \times 3 \times 10^{8}}{8.6 \times 10^{-19}} = 0.8 \times 10^{-7}\)m
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