MISCONCEPTION IN LIGHT, COLOUR AND SIGHT

     Misconception for light, colour and sight

1.      An image can be seen on the screen regardless of where the screen is placed relative to a lens.  To see a larger image on the screen, the screen should be moved further back.

2.      An image is always formed at the focal point of a lens.

3.      The size of an image depends on the size (diameter) of the lens used to formed the image.

4.      An observe can see more of his or her mirror image by moving further back from the mirror.

5.      Light always passes straight through transparent material (without changing direction).

6.      Light is reflected away from shiny surfaces, but light is not reflected from other surfaces.

7.      Light is not necessarily conserved.  It may disappear or be intensified.

8.   When an object is viewed through a transparent material, the object is seen exactly where it is located.

True concept for light colour and sight

1.      To see large image, the object should move between F and 2F.

2.      The formation of an image can be produced if the object came from an infinity distance  from the lens.

3.      The image formed depend on the radius of the lens, centre of curvature.

4.      The size of the image will remain the same as the size of the object

5.      When a light ray goes from one transparent or  translucent material to another it continues to move through the material but not in the same direction due to index of refraction.

6.      The surface of a material must be smooth for reflection to occur. Light is reflected from shiny surfaces because light is not absorbed.

7.      Light is conserved. It cannot be destroyed or created

8.      The light is bending because it looks like the object has shifted a  bit.When the pencil is placed in the water it looks like the part that is in the water is disjointed from the part that is still in air.  This is because of refraction.