1.SUN,STARS AND FIREFLY ARE ------- SOURCES OF LIGHT

2.MATERIALS WHICH DO NOT ALLOW LIGHT TO PASS ARE CALLED

3.MATERIALS WHICH ALLOW LIGHT TO PASS PARTIALLY ARE CALLED AS

4.WHEN THE OPAQUE OBJECT COMES NEAR THE SOURCE OF LIGHT , THE SHADOW BECOMES-

5.THE SHADOW OF AN OPAQUE OBJECT IS ALWAYS----------- IRRESPECTIVE OF ITS COLOURS

6.----------ECLIPSE OCCURS WHEN THE MOON COMES IN BETWEEN THE EARTH AND THE SUN

7.THE ECLIPSES CANNOT BE SEEN ON EVERY NEW MOON DAY AND FULL MOON DAY BECAUSE-

8.-------IS A FORM OF ENERGY THAT PRODUCES THE SENSATION OF SIGHT IN OUR EYES

9.LIGHT ALWAYS PROPAGATES ALONG A STRAIGHT PATH.THIS PROPERTY IS CALLED

10.OBJECTS WHICH DO NOT EMIT LIGHT OF THEIR OWN ARE CALLED