Question

( left.begin{array}{l}c=lambda f lambda=c / g lambda_{a}=c lg a quad>frac{c}{20}=frac{3 times 10^{8}}{20}end{array}right} begin{array}{l}lambda_{b}=frac{3 times 10^{8}}{40} 1 cdot lambda_{c}=frac{3 times 10^{8}}{60}end{array} )
( lambda_{a}: f_{B}: log _{c} B_{i}: )
( lambda_{k}: i=frac{4}{5}+2: )
1
( lambda_{a}: lambda_{b}: lambda_{e}:: 3: 2: 1 )

# 23:3 radiations a, b, c, whose frequeneis are 20 and 40 and 60 teneto tlg. Then determine the ratio of wavelengths of a b c.

Solution