##### Fill in the following blanks with suitable words:(a) The angle of ................ equals the angle of reflection.(b) A person 1 m in front of a plane mirror seems to be......... m away from his image.(c) If you touch your.........ear with right hand in front of a plane mirror, it will be seen in the mirror that your right ear is touched with..........(d) The size of pupil becomes...........when you see in dim light.(e) Night birds have.........cones than rods in their eyes.(f) The image of an object persists on the retina of an eye for about.........second even after the object has disappeared.(g) If the still pictures of a moving object are flashed on our eyes at a rate faster than..............pictures per second, the eye perceives the object as moving.(h) In a movie, the still pictures in proper sequence are projected on the screen usually at the rate of ...........pictures per second.

a) Incidence. This is by law of reflection. The angle of incidence equals the angle of reflection.

b) 2m. Image formed by a plane mirror is far behind the mirror as the object is in front of the mirror.

c) Left ear; left hand. Images formed by a plane mirror are opposite in direction.

d) Large. The size of pupil dilates, facilitated by the iris, so that maximum amount of possible light enters the eye and a person views things clearly.

e) Fewer. Night birds have fewer cones and more rods because rods function in less amount of light. Cones function in bright light.

f) 1/16th. The phenomenon is known as Persistence of Vision. The property of this phenomenon is that the image formed on the retina of the eye persists for about 1/16th of a second even after the object has disappeared.

g) 16. The is due to the phenomenon Persistence of Vision. The property of this phenomenon is that the image formed on the retina of the eye persists for about 1/16th of a second, hence if 16 frames are flashed in front of the eyes, they are viewed by the retina as an ongoing action

h) 24. The frame rate for motion pictures is 24 pictures per second. Frame rate is the rate at which consecutive images are displayed in a display.

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