How was the invention and development of television accomplished ?

One of the first mechanical televisions used a rotating disk with holes arranged in a spiral pattern.

Extra:

This device was created independently by two inventors: Scottish inventor John Logie Baird and American inventor Charles Francis Jenkins. Both devices were invented in the early 1920s.

d) true or false question

(b) britain had a much larger navy than the u.s.

(d) the u.s. had a small army compared to britain.