4(iii)
The below diagram shows that an observer sees the image of an object O at I.
(a) Name and define the phenomenon responsible for seeing the image at a different position.
(b) State the effect on X when:
- (a)Y increases
- (b)Y decreases
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(a) Refraction
The change in direction of the path of light when it passes from one transparent medium to another transparent medium, is called refraction.
(b) The shift X,
- increases when Y increases
- decreases when Y decreases.