Scince

Fill in The Blank


1.) When white light passes through a prism, it is separated into different
colours. This phenomenon is called ______( a )______. The band of coloured
light obtained is called the colour_________( b )_______ of light. It consists of
red, orange, yellow, green, blue, _________( c )______ and violet.

2.) White light is fromed by mixing lights of three colours, namely ____( d )___ __, ______( e )______ and blue. These three coloursare called the ____( f )____ colours.

3.) The retana contains two kinds of light sensitive cells. The are ______( g )_____ and _________( h )_______. The ______( i )______ are sensitive to colours.

4.) The range of colours we can see forms the _____( j )______ spectrum.

5.) Some people have difficulties in distinguishing certain colours. This kind of
eye defect is known as ________( k )________.

6.) The unit of frequency is _______( l )________.Its symbol is ____( m )_____.

7.) The _____( n )______ layer protects us from ovver- exposure to ultraviolet
radiation.

8.) _________( o )____________ discovered radio waves and _____( p )_____________ made successful use of radio waves in communication.


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