4.5 x 10-7m
6.0 x 10-7m
1.7 x 106m
2.2 x 106m
Correct answer is A
\(\frac{1}{4}\) = \(\frac{3 \times 10}{v}\)
v = 2.25 x 108ms-1
\(\lambda\) = \(\frac{V}{F}\)
= \(\frac{2.25 \times 10^8}{5 \times 10^14}\)
\(\lambda\) = 0.45 x 10-6m
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