Question

13. The interference of waves refers to the A) slowing down of one wave in the presence of another e of two or more waves at every point in tho change in wavelength that oecurs when two waves cross one another D) phase change of I 80" that occurs on reflection of a wave at a fixed end E) ability of waves to go around comers 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 medium from d through a boundary surface into a medium that is less dense than the medium from which the wave came which the wave came reflects from the boundary surface of a modium that is less dense than the medium in w C D reflects from the boundary surface of a medium that is more dense than the medium in which the wave is traveling E Both c and d are corroct A virtual image is one which light rays converge but do not pass through B) from which light rays diverge but do not pass through C) from which light rays diverge as they pass through D) toward which light rays converge and pass through E) with a rey normal to a mirror passing through it 16. Real images formed by a spberical mimor are always A) on the side of the mirror opposite the object C))on the same side of the mirror as the object but closer to the mirror than the focal point on the same side of the mirror as the object but further from the mirror than the focal point E) none of the above

Answer 1

13) interference of the waves is the process when two wave meet while traveling in same medium which will change the wavelength. So according to this option c is correct.

14)Phase of 180 degree happens upon a reflection from a medium that has higher refractive index than the which in the wave is traveling. So according to this, option d is correct answer.

15) A virtual image is formed when rays of light meet the. Extrapolated in the backward direction in order to get an intersection of rays of light. Rays of light converge but don't intersect in real. So option a is correct option.

16) Real image formed by spherical mirror i.e. only by concave mirror. Since plane mirror and convex mirror produces virtual images always. Real images produced by concave mirror/spherical mirror only if the object is placed further away from the mirror than the focal point. And image is produced opposite to the side of object. See figure.

So option a is correct option.