K.C.S.E Physics Q & A - MODEL 2007PP2QN16

K.C.S.E Physics Q & A - MODEL 2007PP2QN16

​(a) Figures 11 (a) and (b) show diagrams of the human eye

​(i) Sketch in figure 11 (a) a ray diagram to show shortsightedness 
(ii) Sketch in figure 11 ( b) a ray diagram to show how a lens can be used to
correct the shortsightedness 
(b) Figure 12 shows the features of a simple camer

(i) Name the parts labeled A and B 
A ……………………………………….
B ……………………………………….
(ii) A still object is placed at a certain distance from the camera. Explain the adjustments necessary for a clear image of the object to be formed.
(iii) State the functions of the shutter and the parts labeled A and B 
Shutter ………………………………………………………………….
A…………………………………………………………………………
B ………………………………………………………………………..
(c) A lens forms a clear image on a screen when the distance between the screen and the object is 80cm. If the image is 3 times the height of the object, determine.
(i) The distance of the image from the lens 
(ii) The focal length of the lens 

answers