Question

6.Who was the first to use radio waves to

detect "the presence of distant metallic

objects"?

A. Joseph Niepce

B. Blaise Pascal

C. Linus Pauling

D. Hulsmeyer

​

Answer 1

Ans. D

Sol.• The German inventor Christian

Hulsmeyer was the first to use radio

waves to detect "the presence of distant

metallic objects".

• 1904, he demonstrated the feasibility of

detecting a ship in dense fog, but not its

distance from the transmitter.

Answer 2

Answer:

your ans is d) hulsmeyer