1) What do u meant by photophone ?

Biology

2 answers:

Viefleur [7K]2 years ago

7 0

Answer:

June 3, 1880. You may know that a telephone uses electricity to send voice communications. However, you may not know that the man who invented the telephone, Alexander Graham Bell (1847-1922) had another invention that used light to transmit sound. He called it the photophone.

Explanation:

Debora [2.8K]2 years ago

3 0

jab Nye miljate hai tab purane boj lagne lagte hai !

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