Question

The wave length of light is 6800Å. Express it in i)nm ii)u​

Answer 1

Answer :

Wavelength = 6800Å

We know,

› 1nm = 10Å

Hence,

› 6800Å = 6800Å/10

› 6800Å = 680nm

We know,

› 10⁻¹⁰m = 1Å

Hence,

› 6800Å = 6800/1e+10

› 6800Å  = 6.8e-7