In 1570, Dutch scientist ____ __________ invented the astronomy telescope which Galileo modified to increase magnification to 30X in 1609.

(a)  

____ _________ explained the formation of a rainbow, as well as the formation of clouds in 1638.

(a)  

In 1604, ________ _____ described how the eye focused light and showed that light intensity decreased as the square of the distance from the source, a concept known as the Inverse Square Law.

(a)  

In 1900, Max Planck proposed that radiant energy comes in little bundles called ______, later called _______.

(a)  

In 1666, Sir Isaac Newton discovered that white light was made of many _____ and that the colors could be separated using a _____.

(a)