Question

light is still one of the greatest mysteries to man. we.........(a) .......that light travels in waves, and that light waves are made up of electrical......(b)........ magnetic forces traveling along together. They are a kind of electro magnetic waves. In 1990 , a German physicist.....(c)......Max Plank found that waves do not tell the whole story about light. He was trying to ........(d).......how a hot object gives off radiation.

fill in the blanks with appropriate words/phrases.
a. know, realize, understand, forget
b. with, for, and, or
c. called, named, was, known
d. explain, know, discover, research

Answer 1

Heya...!!

________________

a ) know

b ) and

c ) named

d ) explain .

# Hope it helps #

Answer 2

hey

know
with
nammed
know

hope it helpzz..☺