The Kα X-ray emission line of tungsten occurs at λ=0.021nm. The energy difference between K and L levels in this atoms is about The Kα X-ray emission line of tungsten occurs at λ=0.021nm. The energy difference between K and L levels in this atoms is about September 15, 2021 Category: Chapter 18 - Atoms and Nuclei , JEE Mains Physics 2002-2019 Solved Video Solutions , Facebook Messenger WhatsApp Share this:TwitterFacebook Related