Physics

The wavelength of light of a particular colour is 5800 $\mathring{A}$. What is its order of magnitude in meter?

SOLUTION
1 Angstrom, or $1\mathring { A }$ is $1\times { 10 }^{ -10 }$meter.
So, $5800\mathring { A }$ = $5.8\times{ 10 }^{ 3 }\times { 10 }^{ -10 }$meter = $5.8\times { 10 }^{ -7 }$meter.
Hence its magnitude in meter is ${ 10 }^{ -7 }m$

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