E
Editor
Sep 18, 2022
If $\lambda=400 nm$, its value in angstrom unit (=$10^{-10}m$) m is given as:
Difficulty: Easy
A:
$4 \times 10^{3}$
B:
$4 \times 10^{-17}$
C:
$4 \times 10^{17}$
D:
$4 \times 10^{-3}$
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