Question

Electromagnetic wave of wavelenth 1500nm lies in which region of the spectrum ?

Answer 1

1500nm= 1.5 um (micrometer )
It lies in infrared region whose wavelength range varies from 0.7 to 100 um.

hope this helps you

Answer 2

It lies in the infrared region because it is of the range 800 nm - 10^6 nm. So, a wave of 1500 nm lies in the infrared region.