Question

the mean wavelenght of yellow light from a sodium lamp is 5893 A.write it in m and nm

Answer 1

1 A =10⁻¹⁰ m
5893A =5893×10⁻¹⁰ m
          =5.893 x10⁻⁷ m
1A=10⁻¹ m
5893A=5.893x10² nm

Hope it'd be useful.Plzz choose it the best answer.
CHEERS!!!
MASelvam IITian
Booksworm.