Calculate de-Broglie wavelength ( in A) for an average helium atom in a furnance at 400 K. Given mass of helium = 4.002 amu. Calculate de-Broglie wavelength ( in A) for an average helium atom in a furnance at 400 K. Given mass of helium = 4.002 amu. October 14, 2020 Category: Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) , Facebook Messenger WhatsApp Share this:TwitterFacebook Related