Question

For non-polar molecules, there is no absorption or emission in the range of infrared.

(a) True

(b) False

This question was addressed to me in an interview for job.

My question is based upon Properties of Dielectric Materials topic in portion Dielectrics of Engineering Physics II

Answer 1

Correct option is (a) True

For explanation: These molecules possess centre of symmetry and hence the centres of positive and negative charges coincide. Therefore the net charges and net dipole moment of these molecules will be zero and hence these non-polar molecules will not posses any dipole moment in it. Hence there is no absorption or emission in the range of infrared.