Q. Who among the following scientists shared the Nobel Prize in Physics with his son? (UPSC Prelims 2008)
Answer: William Henry Bragg
Notes: William Henry Bragg and his son William Lawrence Bragg shared the 1915 Nobel Prize in Physics for their pioneering work on X-ray crystallography, analyzing crystal structures using X-rays. They were the first father-son duo to win Nobel Prizes in the same field simultaneously. Max Planck won alone in 1918 for quantum theory; Albert Einstein won alone in 1921 for the photoelectric effect; Enrico Fermi won alone in 1938 for neutron-induced radioactivity.