What color of light is being emitted when the electron drops from n= 6 to n=2

When electron drops from n=6 to n=2, it emits wavelength of 410 nm which gives violet color.

Explanation:

Using Rydberg's Equation:

Here

R= Rydberg's constant =

= Wavelength of photon emitted

= 2

= 6

Put the values in the formula:

m

= 410 nm

(1 m = )

This wavelength( 410 nm) is emitted by VIOLET color  

the dissolution of polymer can be thermodynamically described in 2 steps.