12. Is it possible for light intensity to be unaffected by a polarization filter? Explain. [2 marks] 13. Under what conditions is the diffraction of waves through a slit is maximized. [2 marks] 14. Thomas Young showed that light passing through two parallel narrow slits produces a pattern of light and dark fringes. Did this support or contradict Newton's corpuscular theory of light? Explain. [2 marks] 15. Suppose a double-slit experiment is carried out first in air, then completely underwater, with all the factors being the same in each medium, How do the interference patterns differ? [2 marks]