photophone मीनिंग इन हिंदी

उदाहरण वाक्य

1. Kellogg was also the first head of their Photophone development group.
2. Experiments were also to be conducted on the selenium-celled Photophone.
3. It and the later RCA Photophone system were interchangeable in most respects.
4. See RCA Photophone for technical details and lists of the industry adopters.
5. Bell believed the photophone was his most important invention.
6. In its initial form, the photophone receiver was also non-electronic.
7. Bell first demonstrated his Photophone on 3 June 1880.
8. The re-use of the Photophone brand was relatively short-lived.
9. It was marketed by RCA ( then a GE subsidiary ) as RCA Photophone.
10. The photophone was similar to a contemporary telephone, except that it used wire circuit.