Science Project on “Reflecting Colour”, Project Experiment Topics on Light, Sound, Maths, Optical Illusion for Class 8, 9, 10 and 12 Students.
Reflecting Colour
Materials Required:
- A coffee mug
- A paper with printing on it
- Mylar mirror
- Glue
As you know, the rays of light from the sun or an electric bulb are white but in reality they are made up of many colours.
Let us understand how objects get their colour from the colours reflected off them.
When all the colours in white light are reflected, the object appears white.
If an object absorbs all the colours and reflects only the green light, it appears to be green.
If no light is reflected and all the colours of the spectrum are fully absorbed by the object, it appears black in colour.
Another way to make a mirror, which does not reverse, is to place two ordinary mirrors at right angles to each other.
One doesn’t know who the first person was, to think of the following delightful way to demonstrate the properties of such a curved mirror. Take a coffee mug with cylindrical sides as in the illustration. On one side of the mug, on its inside base, glue a piece of paper with printed words on it.
At the top of the mug, directly opposite, glue a rectangle cut from the Mylar mirror paper. When you look at the reflection of the printing in the Mylar, you will find that the printed words read normally.
In an ordinary mirror, light is reflected straight back at you from the same sides of the mirror, causing the image to appear reversed. In a mirror that does not reverse, light rays are reflected into the opposite side of the mirror, before they reach you. So the image is reversed, then reversed again and things appear as you would expect them to be.
The pupil in our eye changes in size. Why? There is a circle of muscles which make up the pupil of the eye. In dim light, the pupil becomes larger in order to admit more light, while in bright light the pupil becomes smaller. You can see this by using a mirror. Look in the mirror in dim light and see your pupils, then switch CSL serve your pupils again.
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