
"It followed from the special theory of relativity
that mass and energy are both but different manifestations
of the same thing  a somewhat unfamiliar conception for
the average mind. Furthermore, the equation E is equal to
m csquared, in which energy is put equal to mass, multiplied
by the square of the velocity of light, showed that very small
amounts of mass may be converted into a very large amount
of energy and vice versa. The mass and energy were in fact
equivalent, according to the formula mentioned above. This
was demonstrated by Cockcroft and Walton in 1932, experimentally." 


From the soundtrack of the
film, Atomic Physics.
Copyright © J. Arthur Rank Organization, Ltd., 1948.
Image © Brown Brothers, Sterling, PA.

