Question

The average wavelength of light from a sodium lamp is `5893 Å.` Express it in (i) metre (ii) nanometer.

Answer 1

Here`lambda = 5893 Å`
(i) As `1 Å = 10^(10)m, :. lambda = 5893xx10^(10)m.`
As `1Å =10^(10)m = (1)/(10)xx10^(-9)m = (1)/(10)nm`
`:. lambda =5893xx(1)/(10)nm = 589.3 nm`