The document contains multiple choice physics questions about wave interference, phase shifts at boundary surfaces, virtual and real images, and image formation by spherical mirrors. Question 13 asks about wave interference and the correct answer is the resultant disturbance of two or more waves at every point in the medium. Question 14 asks about phase shifts on reflection and the correct answer is a 180 degree phase shift when reflecting from a more dense medium. Question 15 asks about virtual images and the correct answer is they are formed from which light rays diverge but do not pass through. Question 16 asks about real images formed by spherical mirrors and the correct answer is they are on the same side as the object and pass through the focal point.

1. 13. The interference of waves refers to the A) slowing down of one wave in the presence of
another. B) resultant disturbance of two or more waves at every point in the medium C) change
in wavelength that occurs when two waves cross one another D) phase change of 1 80° that
occurs on reflection of a wave at a fixed end. E) ability of waves to go around coners 14. A phase
shift of 180 occurs when a light wave A is transmitted through a boundary surface into a medium
that is more dense than the m which the wave came. B. is transmitted through a boundary surface
into a medium that is less dense than the which the wave came. C. reflects from the boundary
surface of a medium that is less dense than the medium in w is traveling. D. reflects from the
boundary surface of a medium that is more dense than the medium in wave is traveling E. Both c
and d are corect 15. A virtual image is one toward which light rays converge but do not pass
through B) lfrom which light rays diverge but do not pass through from which light rays diverge
as they pass through D) toward which light rays converge and pass through E) with a ray normal
to a mirnor passing through it 16 Real images formed by a spherical mirror are always: A) on the
side of the mirror opposite the object B) on the same side of the mirror as the object but closer to
the mirror than the object the same side of the mirror as the object but closer to the mirror than
the focal point he same side of the mirror as the object but further from the mirror than the focal
poir of the above
Solution
ans 13. B) resultant disturbance of two or more
ans 14.D) reflects from the boundary surface more dense
ans 15) B
ans 16.D)