Q2 of 8 Page 118

Observe the colours of light coming out of the CD through filters of different colours and record your observations in your science diary.

The principal behind this type of phenomena is that the filters only allow certain colour to pass and block the others. For example, the red filter will only allow the red colour to pass through it and will block the other colour. One more example is of yellow filter, in this case the filter will allow yellow as well as red and green colour light because red and green are constituents of yellow colour.


All the colour observed are same as of filter colour or its constituents.


More from this chapter

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4

What do you mean by electromagnetic spectrum?

 5

The telescope ‘Chandra’ is placed in the space. What is the advantage of placing it there? Explain with reference to the scattering of light in the atmosphere.

 6

If a plant with green leaves and red flowers is kept in light with the following colours, what will be the observed colours of leaves and flowers?

1. Green


2. Yellow


3. Red


4. Blue

 1

White light is allowed to fall on the bright side of a compact disc (CD). The reflected light is allowed to fall on a white wall. Observe the colors available in the spectrum and write them down in the science diary.