Question

The wavelength of light is 5000 A0. Express it in: a. nanometre b. metre

Answer 1

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The wavelengths of light is 5800 A O

1nm = 10 A O

5800 AO = 5800 /10 = 580 nm

10000000000 = 1m

5800 A = 5800/10000000000

= 5.8 × 10^-7 m....

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Answer 2

1 Angstrom, or 1

A

˚

is 1×10

−10

meter.

So, 5800

A

˚

= 5.8×10

3

×10

−10

meter = 5.8×10

−7

meter.

Hence its magnitude in meter is 10

−7

m